#include <bits/stdc++.h>   using namespace std;   int f(int, int);   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     int n, m, k;     cin >> n >> m >> k;     int a[m + 1];     int c[m];     int b = 0;     for (int i = 0; i < m; i++) {       c[i] = 0;     }     for (int i = 0; i <= m; i++) {       cin >> a[i];     }     for (int i = 0; i < m; i++) {       for (int j = 1; j <= n; j++) {         if (f(a[i], j) != f(a[m], j)) c[i]++;       }       if (c[i] <= k) b++;     }     cout << b;     return (0);   }   int f(int q, int w) {     int e = q;     for (int i = 1; i < w; i++) {       e = e / 2;     }     return (e % 2);   }   