Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:58:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Comp.size();i++) ^ user.cpp:60:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Comp[i].size();j++) ^ user.cpp:48:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d %d",&N,&M); ^ user.cpp:51:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d %d",&X,&Y); ^