Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:13:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vecini[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:24:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&n); ^ user.cpp:27:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d ",&val[i]); ^ user.cpp:32:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d %d ",&x,&y); ^