Compilare: user.cpp: In function ‘int main()’: user.cpp:37:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in", "r", stdin); ^ user.cpp:38:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.out", "w", stdout); ^ user.cpp:79:30: warning: ‘ymn’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<mn<<" "<<xmn<<" "<<ymn<<"\n"; ^ user.cpp:79:20: warning: ‘xmn’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<mn<<" "<<xmn<<" "<<ymn<<"\n"; ^