Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:24:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[nod].size();++i) ^ user.cpp:29:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[nod].size();i++) ^ user.cpp: In function ‘void Read()’: user.cpp:45:23: warning: left operand of comma operator has no effect [-Wunused-value] for(int i=1;a,b,i<N;++i) ^ user.cpp:45:27: warning: right operand of comma operator has no effect [-Wunused-value] for(int i=1;a,b,i<N;++i) ^ user.cpp:35:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zvon.in","r",stdin); ^ user.cpp:36:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("zvon.out","w",stdout); ^ user.cpp:38:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&T); ^ user.cpp:43:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:47:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^