Eroare de compilare: user.cpp: In function ‘void sol()’: user.cpp:88:30: error: no matching function for call to ‘std::bitset<510u>::reference::flip(int)’ b[x[i]][m + 1].flip(1); ^ user.cpp:88:30: note: candidate is: In file included from user.cpp:12:0: /usr/include/c++/4.8/bitset:832:2: note: std::bitset<_Nb>::reference& std::bitset<_Nb>::reference::flip() [with unsigned int _Nb = 510u] flip() _GLIBCXX_NOEXCEPT ^ /usr/include/c++/4.8/bitset:832:2: note: candidate expects 0 arguments, 1 provided user.cpp:128:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < rez.size(); ++i) { ^ user.cpp:130:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i != rez.size() - 1) ^ user.cpp: In function ‘int main()’: user.cpp:137:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("becuriacm.in", "r", stdin); ^ user.cpp:138:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("becuriacm.out", "w", stdout); ^