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;
using Int = long long;
template <class T> void chmin(T& x, T y) { if (x > y) x = y; }
int main() {
    int T; cin >> T;
    while (T--) {
        int N; cin >> N;
        vector<Int> A(N); for (auto &a : A) cin >> a;
        string S; cin >> S;
        vector<Int> base;
        int ans = 0;
        for (int i = N - 1; i >= 0; i--) {
            Int x = A[i];
            for (auto b : base) chmin(x, x ^ b);
            if (x != 0) {
                if (S[i] == '0') base.push_back(x);
                else { ans = 1; break; }
            }
        }
        cout << ans << '\n';
    }
    return 0;
}