Be the Winner(结论:反nim博弈)
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Be the Winner(结论:反nim博弈)
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Be the Winner
結論
記一個結論:反nim博弈,先手必勝1:尼姆和為零,所有值為1。2:尼姆和不為零,有一個大于1的數。
代碼
/*Author : lifehappy */ #pragma GCC optimize(2) #pragma GCC optimize(3) #include <bits/stdc++.h>#define mp make_pair #define pb push_back #define endl '\n' #define mid (l + r >> 1) #define lson rt << 1, l, mid #define rson rt << 1 | 1, mid + 1, r #define ls rt << 1 #define rs rt << 1 | 1using namespace std;typedef long long ll; typedef unsigned long long ull; typedef pair<int, int> pii;const double pi = acos(-1.0); const double eps = 1e-7; const int inf = 0x3f3f3f3f;inline ll read() {ll f = 1, x = 0;char c = getchar();while(c < '0' || c > '9') {if(c == '-') f = -1;c = getchar();}while(c >= '0' && c <= '9') {x = (x << 1) + (x << 3) + (c ^ 48);c = getchar();}return f * x; }int main() {// freopen("in.txt", "r", stdin);// freopen("out.txt", "w", stdout);// ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);int n;while(cin >> n) {int num = 0, ans = 0, x;for(int i = 1; i <= n; i++) {cin >> x;ans ^= x;if(x > 1) num++;}if((num && ans) || (!ans && !num)) puts("Yes");else puts("No");}return 0; }總結
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