Compilare: user.cpp: In function ‘void dfs(unsigned int, unsigned int)’: user.cpp:11:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<graf[nod].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:20:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%ld%ld",&n,&m); ^ user.cpp:23:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f1,"%ld%ld",&x,&y); ^