Compilare: user.cpp: In function ‘int bfs()’: user.cpp:33:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<T[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:59:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<T[n].size();j++) ^ user.cpp:48:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in","r",stdin); ^ user.cpp:49:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.out","w",stdout); ^ user.cpp:50:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n ,&m); ^ user.cpp:53:35: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&z); ^