#include<iostream>
#include<unordered_map>

using namespace std;

int main() {
	int n;
	while (cin >> n && n != 0) {
		unordered_map<int, int> mp;
		while (n -- ) {
			int x;
			cin >> x;
			mp[x] ++ ;
		}
		int score;
		cin >> score;
		auto it = mp.find(score);
		if (it != mp.end()) {
			cout << mp[score] << endl;
		} else {
		    cout << '0' << endl;
		}
	}
	return 0;
}