Compilare: user.cpp: In function ‘int main()’: user.cpp:42:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i++) ^ user.cpp:51:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<ans.size();i++) ^ user.cpp:24:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (file, "%d%d", &n,&m); ^ user.cpp:27:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (file, "%d%d%d", &x,&y,&z); ^