Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:14:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nods].size ();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:29:11: warning: unused variable ‘rad’ [-Wunused-variable] int n,i,rad,n1,n2; ^ user.cpp:30:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in,"%d",&n); ^ user.cpp:32:29: 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:37:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (in,"%d%d",&n1,&n2); ^