#include <bits/stdc++.h>

using namespace std;

#define pb push_back
#define ll long long

int main(){
	int n,m,k,a[11111],m1[11111];
	cin >> n >> m >> k;
	for (int i = 0;i<m;i++){
		cin >> a[i];
	}
	int x;
	cin >> x;
	for (int  i = 0;i<n;i++){
		m1[i] = x % 2;
		x/=2;
	}
	m1[n] = x;
//	for(int i = 0;i<n;i++) cout << m1[i]; cout << endl;
	int ans = 0;
	for (int i = 0;i<m;i++){
		int cnt = 0;
		int y = a[i];
		for (int j = 0;j<n+1;j++){
			if (y % 2 != m1[j]) cnt++;
			y/=2;
		}
		if (cnt <= k) ans++;
	}
	cout << ans;
}