Compilare: user.cpp: In function ‘void DFS(int, int*, std::vector<int>*)’: user.cpp:15:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[node].size();i++) ^ user.cpp: In function ‘void DFS2(int)’: user.cpp:32:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<RevRest[node].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:87:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[node].size();i++) ^ user.cpp:99:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Rev[node].size();i++) ^ user.cpp:110:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<Comp[i].size();j++) ^ user.cpp:71:28: 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:75:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&X[i],&Y[i]); ^