func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 100000;   const long long INF = 1000000000000000;   int a[N];   int main() {     int t;     cin >> t;     for (int q = 0; q < t; q++) {       int n, k;       cin >> n >> k;       for (int j = 0; j < n; j++) {         cin >> a[j];       }       long long answer = -INF;       for (long long j = 1; j < n; j++) {         long long i = j - 1;         while (i >= 0 and (i + 1) * (j + 1) - k * a[j] > answer) {           long long result = (i + 1) * (j + 1) - k * (a[i] | a[j]);           answer = max(answer, result);           i--;         }       }       cout << answer << endl;     }     return 0;   }   