Compilare: user.cpp: In function ‘int main()’: user.cpp:79:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < mv.length(); i++, pc++) { ^ user.cpp:59:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.in", "r", stdin); ^ user.cpp:60:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cobai.out", "w", stdout); ^