Problem: There are two persons, numbered 0 and 1, and a variable x whose initial value is 0. The two persons now play a game. The game is played in N rounds. The following should be done in the i-th round (1 \leq i \leq N):

* Person S_i does one of the following:
* Replace x with x \oplus A_i, where \oplus represents bitwise XOR.
* Do nothing.



Person 0 aims to have x=0 at the end of the game, while Person 1 aims to have x \neq 0 at the end of the game.

Determine whether x becomes 0 at the end of the game when the two persons play optimally.

Solve T test cases for each input file.

Constraints

* 1 \leq T \leq 100
* 1 \leq N \leq 200
* 1 \leq A_i \leq 10^{18}
* S is a string of length N consisting of `0` and `1`.
* All numbers in input are integers.

Input

Input is given from Standard Input in the following format. The first line is as follows:


T


Then, T test cases follow. Each test case is given in the following format:


N
A_1 A_2 \cdots A_N
S


Output

For each test case, print a line containing `0` if x becomes 0 at the end of the game, and `1` otherwise.

Example

Input

3
2
1 2
10
2
1 1
10
6
2 3 4 5 6 7
111000


Output

1
0
0

Solution (in CPP):

Solution:
#include<bits/stdc++.h>
using namespace std;

typedef long long ll;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin >> t;
    while (t--) {
        int n;
        cin >> n;
        vector<ll> a(n);
        for (auto& x : a)
            cin >> x;
        string s;
        cin >> s;

        vector<ll> basis(64, 0);
        int ans = 0;
        for (int i = n - 1; i >= 0; i--) {
            ll x = a[i];
            bool was = 0;
            for (int j = 0; j < 64; j++) {
                if (!((x >> j) & 1)) continue;
                if (!basis[j]) {
                    was = 1;
                    basis[j] = x;
                    break;
                }
                x ^= basis[j];
            }

            if (was && s[i] == '1') {
                ans = 1;
                break;
            }
        }
        
        cout << ans << '\n';
    }
    return 0;
}