Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<g[v].size();i++) ^ user.cpp: In function ‘void solve()’: user.cpp:49:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i+1<res.size();i++) cout<<res[i]<<" "; ^