洛谷 P1247 取火柴游戏

新技能点:博弈论:内容:Nim游戏
参考链接:https://blog.csdn.net/summer__show_/article/details/70185470
https://baike.baidu.com/item/Nim%E6%B8%B8%E6%88%8F/6737105?fr=aladdin
https://blog.csdn.net/kamisama123/article/details/77649118

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#include<iostream>
#include<cmath>
#include<algorithm>
#include<queue>
#include<stack>
#define ll long long
#define pii pair<int,int>
#define PINF 0x7fffffff
#define NINF 0x80000000
using namespace std;
int k;
int arr[500005];
int main() {
    ios::sync_with_stdio(false);
    cin >> k;
    for (int i = 1; i <= k; i++)cin >> arr[i];
    int re = arr[1];
    for (int i = 2; i <= k; i++)re ^= arr[i];
    if (re == 0) {
        cout << "lose";
        return 0;
    }
    for (int i = 1; i <= k; i++) {
        if ((re^arr[i]) < arr[i]) {
            cout << arr[i] - (re ^ arr[i]) << " " << i << endl;
            arr[i] ^= re;
            for (int i = 1; i <= k; i++)cout << arr[i] << " ";
            break;
        }
    }
}

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