ამოხსნების სტატუსი

ამ გვერდზე თქვენ იხილავთ გაგზავნილი ამოხსნების სტატუსს.


გაგზავნის თარიღი: 23.09.2022 15:31:41

ამოცანა: შოკოლადის სამი პაკეტი

მომხმარებელი: TOMAshvili

ვერდიქტი: ამოუხსნელი

შეფასება: 0 ქულა







#include <bits/stdc++.h>;
using namespace std;
int k,a,b,c;
int main () {
    cin<<k<<a<<b<<c;
    count<<a%k+b%k+c%k:
main.cpp:1:25: warning: extra tokens at end of #include directive
 #include <bits/stdc++.h>;
                         ^
main.cpp: In function 'int main()':
main.cpp:5:8: error: no match for 'operator<<' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'int')
     cin<<k<<a<<b<<c;
     ~~~^~~
main.cpp:5:8: note: candidate: operator<<(int, int) <built-in>
main.cpp:5:8: note:   no known conversion for argument 1 from 'std::istream {aka std::basic_istream<char>}' to 'int'
In file included from /usr/include/c++/6/regex:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:110,
                 from main.cpp:1:
/usr/include/c++/6/bits/regex.h:1483:5: note: candidate: template<class _Ch_type, class _Ch_traits, class _Bi_iter> std::basic_ostream<_CharT, _Traits>& std::__cxx11::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::sub_match<_Bi_iter>&)
     operator<<(basic_ostream<_Ch_type, _Ch_traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/regex.h:1483:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:3160:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::piecewise_linear_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:3160:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2944:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::piecewise_constant_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2944:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2734:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::discrete_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2734:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2275:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::student_t_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2275:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2200:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::fisher_f_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2200:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2036:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::chi_squared_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2036:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1963:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::lognormal_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1963:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1667:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::binomial_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1667:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1400:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::poisson_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1400:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1195:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::negative_binomial_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1195:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:831:5: note: candidate: template<class _RandomNumberEngine, long unsigned int __k, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::shuffle_order_engine<_RandomNumberEngine, __k>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:831:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:702:5: note: candidate: template<class _RandomNumberEngine, long unsigned int __p, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::discard_block_engine<_RandomNumberEngine, __p, __r>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:702:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:632:5: note: candidate: template<class _UIntType, long unsigned int __w, long unsigned int __s, long unsigned int __r, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::subtract_with_carry_engine<_UIntType, __w, __s, __r>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:632:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:156:5: note: candidate: template<class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::linear_congruential_engine<_UIntType, __a, __c, __m>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:156:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2598:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::extreme_value_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2598:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2522:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::weibull_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2522:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1731:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::exponential_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1731:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2444:5: note: candidate: template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::gamma_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2444:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1080:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::geometric_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1080:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:1898:5: note: candidate: template<class _RealType1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::normal_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:1898:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:998:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::bernoulli_distribution&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:998:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:2123:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::cauchy_distribution<_RealType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:2123:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:936:5: note: candidate: template<class _RealType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::uniform_real_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:936:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:877:5: note: candidate: template<class _IntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::uniform_int_distribution<_IntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:877:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:51:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.tcc:477:5: note: candidate: template<class _UIntType1, long unsigned int __w1, long unsigned int __n1, long unsigned int __m1, long unsigned int __r1, _UIntType1 __a1, long unsigned int __u1, _UIntType1 __d1, long unsigned int __s1, _UIntType1 __b1, long unsigned int __t1, _UIntType1 __c1, long unsigned int __l1, _UIntType1 __f1, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.tcc:477:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/random:49:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:108,
                 from main.cpp:1:
/usr/include/c++/6/bits/random.h:1269:5: note: candidate: template<class _RandomNumberEngine, long unsigned int __w, class _UIntType, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::independent_bits_engine<_RandomNumberEngine, __w, _UIntType>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/random.h:1269:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/future:40:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:105,
                 from main.cpp:1:
/usr/include/c++/6/thread:263:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::thread::id)
     operator<<(basic_ostream<_CharT, _Traits>& __out, thread::id __id)
     ^~~~~~~~
/usr/include/c++/6/thread:263:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95:0,
                 from main.cpp:1:
/usr/include/c++/6/valarray:1175:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__shift_left, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const _Tp&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(<<, __shift_left)
 ^
/usr/include/c++/6/valarray:1175:1: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   mismatched types 'const std::valarray<_Tp>' and 'int'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95:0,
                 from main.cpp:1:
/usr/include/c++/6/valarray:1175:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__shift_left, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const std::valarray<_Tp>&, const _Tp&)
 _DEFINE_BINARY_OPERATOR(<<, __shift_left)
 ^
/usr/include/c++/6/valarray:1175:1: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::valarray<_Tp>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95:0,
                 from main.cpp:1:
/usr/include/c++/6/valarray:1175:1: note: candidate: template<class _Tp> std::_Expr<std::_BinClos<std::__shift_left, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_left, _Tp>::result_type> std::operator<<(const std::valarray<_Tp>&, const std::valarray<_Tp>&)
 _DEFINE_BINARY_OPERATOR(<<, __shift_left)
 ^
/usr/include/c++/6/valarray:1175:1: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::valarray<_Tp>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95,
                 from main.cpp:1:
/usr/include/c++/6/bits/valarray_after.h:410:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__shift_left, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
     ^
/usr/include/c++/6/bits/valarray_after.h:410:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95,
                 from main.cpp:1:
/usr/include/c++/6/bits/valarray_after.h:410:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__shift_left, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
     ^
/usr/include/c++/6/bits/valarray_after.h:410:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95,
                 from main.cpp:1:
/usr/include/c++/6/bits/valarray_after.h:410:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__shift_left, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
     ^
/usr/include/c++/6/bits/valarray_after.h:410:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'int'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95,
                 from main.cpp:1:
/usr/include/c++/6/bits/valarray_after.h:410:5: note: candidate: template<class _Dom> std::_Expr<std::_BinClos<std::__shift_left, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)
     _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
     ^
/usr/include/c++/6/bits/valarray_after.h:410:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/valarray:587:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95,
                 from main.cpp:1:
/usr/include/c++/6/bits/valarray_after.h:410:5: note: candidate: template<class _Dom1, class _Dom2> std::_Expr<std::_BinClos<std::__shift_left, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_left, typename _Dom1::value_type>::result_type> std::operator<<(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)
     _DEFINE_EXPR_BINARY_OPERATOR(<<, __shift_left)
     ^
/usr/include/c++/6/bits/valarray_after.h:410:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/memory:82:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:82,
                 from main.cpp:1:
/usr/include/c++/6/bits/shared_ptr.h:66:5: note: candidate: template<class _Ch, class _Tr, class _Tp, __gnu_cxx::_Lock_policy _Lp> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__shared_ptr<_Tp, _Lp>&)
     operator<<(std::basic_ostream<_Ch, _Tr>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/shared_ptr.h:66:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:363:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_time<_CharT>)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:363:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:311:5: note: candidate: template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_money<_MoneyT>)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:311:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:238:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:238:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:208:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setprecision)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:208:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:178:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setfill<_CharT>)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:178:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:143:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:143:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:109:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setiosflags)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:109:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:72:0,
                 from main.cpp:1:
/usr/include/c++/6/iomanip:79:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Resetiosflags)
     operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
     ^~~~~~~~
/usr/include/c++/6/iomanip:79:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:66:0,
                 from main.cpp:1:
/usr/include/c++/6/bitset:1530:5: note: candidate: template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::bitset<_Nb>&)
     operator<<(std::basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bitset:1530:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/ccomplex:39:0,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/complex:526:5: note: candidate: template<class _Tp, class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::complex<_Tp>&)
     operator<<(basic_ostream<_CharT, _Traits>& __os, const complex<_Tp>& __x)
     ^~~~~~~~
/usr/include/c++/6/complex:526:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:628:5: note: candidate: template<class _CharT, class _Traits, class _Tp> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&)
     operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x)
     ^~~~~~~~
/usr/include/c++/6/ostream:628:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:574:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)
     operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
     ^~~~~~~~
/usr/include/c++/6/ostream:574:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:569:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)
     operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
     ^~~~~~~~
/usr/include/c++/6/ostream:569:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:556:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)
     operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
     ^~~~~~~~
/usr/include/c++/6/ostream:556:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/ostream:638:0,
                 from /usr/include/c++/6/istream:39,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/bits/ostream.tcc:321:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
     ^~~~~~~~
/usr/include/c++/6/bits/ostream.tcc:321:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:539:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)
     operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
     ^~~~~~~~
/usr/include/c++/6/ostream:539:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:519:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)
     operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
     ^~~~~~~~
/usr/include/c++/6/ostream:519:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:514:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)
     operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
     ^~~~~~~~
/usr/include/c++/6/ostream:514:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:508:5: note: candidate: template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)
     operator<<(basic_ostream<char, _Traits>& __out, char __c)
     ^~~~~~~~
/usr/include/c++/6/ostream:508:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<char, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:502:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)
     operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
     ^~~~~~~~
/usr/include/c++/6/ostream:502:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/istream:39:0,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/ostream:497:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)
     operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
     ^~~~~~~~
/usr/include/c++/6/ostream:497:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/bits/ios_base.h:46:0,
                 from /usr/include/c++/6/ios:42,
                 from /usr/include/c++/6/istream:38,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/system_error:209:5: note: candidate: template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)
     operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
     ^~~~~~~~
/usr/include/c++/6/system_error:209:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
In file included from /usr/include/c++/6/string:52:0,
                 from /usr/include/c++/6/bits/locale_classes.h:40,
                 from /usr/include/c++/6/bits/ios_base.h:41,
                 from /usr/include/c++/6/ios:42,
                 from /usr/include/c++/6/istream:38,
                 from /usr/include/c++/6/sstream:38,
                 from /usr/include/c++/6/complex:45,
                 from /usr/include/c++/6/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52,
                 from main.cpp:1:
/usr/include/c++/6/bits/basic_string.h:5340:5: note: candidate: template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)
     operator<<(basic_ostream<_CharT, _Traits>& __os,
     ^~~~~~~~
/usr/include/c++/6/bits/basic_string.h:5340:5: note:   template argument deduction/substitution failed:
main.cpp:5:10: note:   'std::istream {aka std::basic_istream<char>}' is not derived from 'std::basic_ostream<_CharT, _Traits>'
     cin<<k<<a<<b<<c;
          ^
main.cpp:6:10: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator<<'
     count<<a%k+b%k+c%k:
     ~~~~~^~~~~~~~~~~~~
main.cpp:6:23: error: expected '}' at end of input
     count<<a%k+b%k+c%k:
                       ^