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81 lines
1.3 KiB
C++
81 lines
1.3 KiB
C++
#include <cstring>
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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 = 35;
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int t, n, a[N][N];
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int gauss() {
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int r, c;
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for (r = c = 1; c <= n; c++) {
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int t = r;
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for (int i = r; i <= n; i++) {
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if (a[i][c]) t = i;
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}
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if (!a[t][c]) continue;
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std::swap(a[t], a[r]);
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for (int i = r + 1; i <= n; i++) {
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if (a[i][c]) {
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for (int j = n + 1; j >= c; j--) {
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a[i][j] ^= a[r][j];
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}
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}
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}
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r++;
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}
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int res = 1;
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if (r <= n) {
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for (int i = r; i <= n; i++) {
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if (a[i][n + 1]) return -1;
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res <<= 1;
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}
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}
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return res;
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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 >> t;
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while (t--) {
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memset(a, 0x00, sizeof(a));
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cin >> n;
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for (int i = 1; i <= n; i++) {
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cin >> a[i][n + 1];
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}
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for (int i = 1, x; i <= n; i++) {
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cin >> x;
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a[i][n + 1] ^= x;
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a[i][i] = 1;
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}
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int x, y;
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while (cin >> x >> y, x || y) a[y][x] = 1;
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int r = gauss();
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if (r == -1) {
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cout << "Oh,it's impossible~!!" << endl;
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} else {
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cout << r << endl;
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}
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}
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return 0;
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}
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