Compilare: user.cpp: In function ‘void dfs(const short int&)’: user.cpp:27:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (short int i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘int main()’: user.cpp:64:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&K); ^ user.cpp:67:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^