Help me in solving CS2023_PON problem

help
,
1

My issue

My code

#include <bits/stdc++.h>
#define MOD 1000000007

using namespace std;

int main() {
	ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int t, n;
    int b;
    cin >> t;
    while(t--){
        cin >> n >> b;
        int arr[n];
        int element;
        int k = (1<<31)-1;
        for(int i = 0; i < n; i++){
            cin >> element;
            if((element & b) == b){ // checks whether element is a super mask of b.
                k &= element;
            }
        }
        if(k == b)
            cout << "yes\n";
        else
            cout << "no\n";
    }
	return 0;
}

Problem Link: CS2023_PON Problem - CodeChef
when i initialize k= (1<<30)-1 it gives wrong answer can anyone tell why?