func_code_string: #include <bits/stdc++.h>   using namespace std;   int32_t main() {     ios::sync_with_stdio(false);     cin.tie(0);     long long n, x, k, mult = 1;     cin >> n >> k >> x;     while (k--) {       mult *= x;     }     vector<long long> pre(n + 1, 0), suf(n + 2, 0), v(n + 1, 0);     for (long long i = 1; i <= n; i++) {       cin >> v[i];       pre[i] = pre[i - 1] | v[i];     }     for (long long i = n; i >= 1; i--) suf[i] = suf[i + 1] | v[i];     long long ans = 0;     for (long long i = 1; i <= n; i++)       ans = max(ans, pre[i - 1] | (mult * v[i]) | suf[i + 1]);     cout << ans;     return 0;   }   