Compilare: user.cpp: In function ‘bool verif()’: user.cpp:22:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = k; i < sol.size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:44:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nucleulvaloros.in", "r", stdin); ^ user.cpp:45:47: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nucleulvaloros.out", "w", stdout); ^