Compilare: user.cpp: In function ‘void dfP(int)’: user.cpp:16:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘void dfM(int, int)’: user.cpp:28:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<V2[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:67:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0;j<rez[i].size();j++) ^ user.cpp:35:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ctc.in","r",stdin); ^ user.cpp:36:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.cpp:41:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^