Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:35:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[nod].size();i++){ ~^~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:65:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i].size()<k) ~~~~~~~~~~~^~ user.cpp:73:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<v[zc].size();i++){ ~^~~~~~~~~~~~~ user.cpp:46:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d%d",&n,&m,&k); ^