Compilare: user.cpp: In function ‘int main()’: user.cpp:58:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(vec[i].comp.size() == maxim) cnt ++; ^ user.cpp:59:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(vec[i].comp.size() > maxim) ^ user.cpp:67:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i< vec[p].comp.size(); ++i) printf("%d ", vec[p].comp[i]); ^ user.cpp:22:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(in, "r", stdin); ^ user.cpp:23:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(out, "w", stdout); ^ user.cpp:24:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &N); ^ user.cpp:28:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &val); ^