Compilare: main.cpp: In function 'void dfs(int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<G[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=n;i++) ^~~ main.cpp:59:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' fout<<ans[nr].size()<<'\n'; ^~~~ main.cpp:60:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<ans[nr].size();i++) fout<< ans[nr][i]<<" "; ~^~~~~~~~~~~~~~~