View Code of Problem 122

#include<bits/stdc++.h>
using namespace std;
int main(){
	int t;
	cin>>t;
	for(int i=0;i<t;i++){
		int n;
		cin>>n;
		int a,b;
		for(int j=0;j<n-1;j++){
			cin>>a>>b;
		}
		if((n-1)%2==0){
			cout<<"Bob"<<endl;
		}
		else cout<<"Alice"<<endl;
	}
}