func_code_string: #include <bits/stdc++.h>   int a[100006];   int vis[100006];   int visyu[100006];   int main() {     int n, x;     scanf( %d%d , &n, &x);     for (int i = 1; i <= n; i++) {       scanf( %d , &a[i]);       vis[a[i]]++;       if (vis[a[i]] == 2) {         printf( 0 n );         return 0;       }     }     int mans = -1;     for (int i = 1; i <= n; i++) {       visyu[a[i] & x]++;       if (visyu[a[i] & x] && vis[a[i] & x] && ((a[i] & x) != a[i])) {         printf( 1 n );         return 0;       } else if (visyu[a[i] & x] == 2) {         mans = 2;       }     }     printf( %d n , mans);   }   