Compilare: user.cpp: In function ‘int main()’: user.cpp:38:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<v[y].size()&&!gasit; j++) ^ user.cpp:51:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<ans.size()-1; i++) ^ user.cpp:12:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.in","r",stdin); ^ user.cpp:13:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ciclueuler.out","w",stdout); ^