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;
typedef vector<ll> vi;
#define INF (1e9)

int main() {
  int T;
  cin >> T;
  while (T--) {
    int N;
    cin >> N;
    vi A(N);
    for (int i = 0; i < N; i++) cin >> A[i];
    string S;
    cin >> S;

    vi B(1, 0);
    int ans = 0;
    for (int i = N - 1; i >= 0; i--) {
      for (ll b : B) A[i] = min(A[i], A[i] ^ b);
      if (A[i] == 0) continue;
      if (S[i] == '0')
        B.push_back(A[i]);
      else {
        ans = 1;
      }
    }
    cout << ans << endl;
  }
}