poj2234

• #include <iostream>using namespace std;int main(){    int n;    for(;scanf("%d",&n)==1;)    {                            int win=0;                            for(int i=0;i<n;i++)                            {                                    int K;                                    scanf("%d",&K);                                    win^=K;                            }                            if(win)printf("Yes\n");                            else printf("No\n");    }    return 0;    }

//博弈论 自勉