Compilare: user.cpp: In function ‘void updateSol(std::vector<int>&, int&)’: user.cpp:67:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (cntNormal >= (sol.size() - 1) / 2) { ^ user.cpp: In function ‘void read()’: user.cpp:14:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:17:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &A[idx][i]); ^ user.cpp: In function ‘int main()’: user.cpp:110:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.in", "r", stdin); ^ user.cpp:111:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("biperm.out", "w", stdout); ^