#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
	while(cin >> n){
		if(n == 0)
			break;
		map<int,int> mp;
		while(n--){
			int x;
			cin >> x;
			mp[x]++;
		}
		int g;
		cin >> g;
		cout << mp[g] << endl;
	}
    return 0;
}