func_code_string: #include <bits/stdc++.h>   using namespace std;   long long a[200005], dp1[200005], dp2[200005];   int main() {     long long n, k, x;     int xx;     cin >> n >> k >> x;     for (int i = 1; i <= n; i++) {       scanf( %d , &xx);       a[i] = xx;     }     sort(a + 1, a + n + 1);     for (int i = 1; i <= n; i++) {       if (i != 1) {         dp1[i] = dp1[i - 1] | a[i - 1];       }     }     for (int i = n; i >= 1; i--) {       dp2[i] = dp2[i + 1] | a[i + 1];     }     long long mx = 0;     long long pw = 1;     for (int i = 1; i <= k; i++) {       pw *= x;     }     for (int i = n; i >= 1; i--) {       mx = max(mx, ((pw * a[i]) | dp1[i] | dp2[i]));     }     cout << mx;   }   