Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:20:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[node].size();i++) ^ user.cpp: In function ‘void RDFS(int)’: user.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Reverse[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:54:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Out.size();i++) ^ user.cpp:57:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Out[i].size();j++) ^ user.cpp:36:25: 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:40:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&X,&Y); ^