#include<bits/stdc++.h>
using namespace std;

int main(){
	
	int n;
	while(cin >> n){
		if(!n) break;
		
		map<int, int> mp;
		while(n --){
			int g; cin >> g;
			mp[g] ++;
		}
		
		int f; cin >> f;
		if(mp.find(f) == mp.end()) cout << '0' << endl;
		else cout << mp[f] << endl;
	}
	
	return 0;
}