52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
#include<cstdio>
|
|
#include<algorithm>
|
|
#define MAXN 110
|
|
#define MOD 1000007
|
|
using namespace std;
|
|
int a[MAXN], g[MAXN][MAXN];
|
|
int Gauss(int n) {
|
|
int i, j, r, c, cnt;
|
|
for (c = cnt = 0; c < n; c++) {
|
|
for (r = cnt; r < 31; r++) {
|
|
if (g[r][c])
|
|
break;
|
|
}
|
|
if (r < 31) {
|
|
if (r != cnt) {
|
|
for (i = 0; i < n; i++)
|
|
swap(g[r][i], g[cnt][i]);
|
|
}
|
|
for (i = cnt + 1; i < 31; i++) {
|
|
if (g[i][c]) {
|
|
for (j = 0; j < n; j++)
|
|
g[i][j] ^= g[cnt][j];
|
|
}
|
|
}
|
|
cnt++;
|
|
}
|
|
}
|
|
return n - cnt;
|
|
}
|
|
int main() {
|
|
int c;
|
|
int n, i, j;
|
|
int ans, vary;
|
|
scanf("%d", &c);
|
|
while (c--) {
|
|
scanf("%d", &n);
|
|
for (i = 0; i < n; i++)
|
|
scanf("%d", &a[i]);
|
|
for (i = 0; i < 31; i++) {
|
|
for (j = 0; j < n; j++)
|
|
g[i][j] = (a[j] >> i) & 1;
|
|
}
|
|
vary = Gauss(n);
|
|
for (ans = 1; vary--;) {
|
|
ans <<= 1;
|
|
ans %= MOD;
|
|
}
|
|
printf("%d\n", ans);
|
|
}
|
|
return 0;
|
|
}
|