牛客练习赛26 xor序列

时间:2023-03-08 16:37:01

xor序列

思路:线性基

代码:

#pragma GCC optimize(2)
#pragma GCC optimize(3)
#pragma GCC optimize(4)
#include<bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define pi acos(-1.0)
#define LL long long
#define mp make_pair
#define pb push_back
#define ls rt<<1, l, m
#define rs rt<<1|1, m+1, r
#define ULL unsigned LL
#define pll pair<LL, LL>
#define pii pair<int, int>
#define piii pair<pii, int>
#define mem(a, b) memset(a, b, sizeof(a))
#define fio ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define fopen freopen("in.txt", "r", stdin);freopen("out.txt", "w", stout);
//head const int N = 1e5 + ;
vector<int> base;
int main() {
int n, t, q, a, b;
scanf("%d", &n);
for (int i = ; i <= n; i++) {
scanf("%d", &t);
for (int j = ; j < base.size(); j++) if((t^base[j]) < t) t ^= base[j];
if(t) base.pb(t);
}
scanf("%d", &q);
while(q--) {
scanf("%d %d", &a, &b);
a ^= b;
for (int i = ; i < base.size(); i++) if((a^base[i]) < a) a ^= base[i];
if(a) puts("NO");
else puts("YES");
}
return ;
}