Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:47:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<G[nod].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:16:30: 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:19:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&x); ^ user.cpp:35:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d %d",&x,&y); ^