Day12.2（组合、期望、博弈论）

https://vjudge.net/problem/AtCoder-2064

https://vjudge.net/problem/51Nod-1237

http://acm.hdu.edu.cn/showproblem.php?pid=3590  //讲的是错的！！

https://www.lydsy.com/JudgeOnline/problem.php?id=1022 

取石子，反Nim游戏

#include<bits/stdc++.h>
using namespace std;
int main(){
    int T;
    scanf("%d",&T);
    while(T--){
        int n;scanf("%d",&n);
        int ans,x,flag=0;scanf("%d",&ans);if(ans>1) flag=1;
        while(--n) {scanf("%d",&x),ans^=x;if(x>1) flag=1;}
        if((flag>0&&!ans)||(flag==0&&ans)) printf("Brother\n");
        else printf("John\n");
    }
}