Compilare: user.cpp: In function ‘void Sort_Top(int)’: user.cpp:20:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<G[nod].size();i++) ^ user.cpp: In function ‘void DFS(int)’: user.cpp:31:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<V[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:64:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<R[ctc].size();j++){ ^ user.cpp:40:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&m); ^ user.cpp:42:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&x,&y); ^