Compilare: user.cpp: In function ‘int main()’: user.cpp:41:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (itr == end(cnt) || itr->second.size() < p) { ^ user.cpp:26:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("costuri.in", "r", stdin); ^ user.cpp:27:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("costuri.out", "w", stdout); ^