Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vc[n].size();i++) ~^~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:40:2: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;i++) ^~~ user.cpp:41:21: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ fout<<rz[i]<<" "; fout<<"\n"; ^~~~