func_code_string: #include <bits/stdc++.h>   using namespace std;   void reverse_(vector<int> num) {     vector<int> a;     for (int i = num.size() - 1; i > -1; i--) a.push_back(num[i]);     num = a;   }   int main() {     int n, x;     cin >> n >> x;     vector<int> num(n), used(1e5 + 7, 0), step(1e5 + 7, 1e9);     set<int> all;     for (int i = 0; i < n; i++) {       cin >> num[i];       used[num[i]] = 1;       all.insert(num[i]);     }     if (all.size() < n) {       cout <<  0 n ;       return 0;     }     int ans = 1e9;     sort(num.begin(), num.end());     reverse_(num);     for (int i = 0; i < n; i++) {       int now = num[i];       int prev = -1;       int shag = 0;       while (now >= 0 && prev != now) {         if (now != num[i]) {           if (used[now]) {             ans = min(ans, shag);           }         }         if (step[now] != 1e9) {           ans = min(step[now] + shag, ans);         }         step[now] = min(step[now], shag);         prev = now;         now = now & x;         shag++;       }     }     if (ans == 1e9) {       cout <<  -1 n ;       return 0;     }     cout << ans <<   n ;     return 0;   }   