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70
LibreOJ/114/114.cpp
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70
LibreOJ/114/114.cpp
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#include <iostream>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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const int N = 55;
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int n, m, cnt;
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unsigned long long x, k, a[N], p[N], ans;
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inline void insert(unsigned long long x) {
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for (int i = 50; ~i; i--) {
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if (x & (1ull << i)) {
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if (a[i]) {
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x ^= a[i];
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} else {
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for (int k = 0; k < i; k++) {
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if (x & (1ull << k)) x ^= a[k];
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}
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for (int k = i + 1; k <= 50; k++) {
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if (a[k] & (1ull << i)) a[k] ^= x;
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}
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a[i] = x;
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return;
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}
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}
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}
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}
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> n;
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for (int i = 1; i <= n; i++) {
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cin >> x;
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insert(x);
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}
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for (int i = 0; i <= 50; i++) {
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if (a[i]) p[cnt++] = a[i];
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}
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cin >> m;
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while (m--) {
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cin >> k;
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if (cnt != n) k--; // 非空
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if (k >= (1ull << cnt)) {
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cout << -1 << endl;
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} else {
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ans = 0;
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for (int i = 0; i < cnt; i++) {
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if (k & (1ull << i)) ans ^= p[i];
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}
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cout << ans << endl;
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}
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}
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return 0;
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}
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