text: #include "graph.hpp"
  #include "template.hpp"
  #include "tree.hpp"
  
  tree<ll> T;
  
  ll f(ll i) {
    ll res = 0;
    for (auto [j, _] : T[i]) {
      res ^= f(j);
    }
    return res + 1;
  }
  
  int main() {
    ll(N);
    graph<ll> G(N, N - 1);
    cin >> G;
    T = tree<ll>(G);
    yes(f(1) > 1, "Alice", "Bob");
  }
  