Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:19:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0;i< G[x].size();i++) ^ user.cpp: In function ‘void DFST(int)’: user.cpp:34:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0;i<GT[x].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:72:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j < ctc[i].size(); j++) ^ user.cpp:47:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&n,&m); ^ user.cpp:51:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^