Compilare: user.cpp: In function ‘void sortare(int)’: user.cpp:16:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0 ; i < ad[nod].size() ; ++i ) ^ user.cpp: In function ‘int main()’: user.cpp:35:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0 ; i < sol.size() ; ++i ) ^ user.cpp:25:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.in","r",stdin); ^ user.cpp:26:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.out","w",stdout); ^ user.cpp:28:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ user.cpp:31:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^