#include<iostream>
using namespace std;

const int N=110;

int n,c[N];

int main()
{
	while(cin>>n)
	{
		if(n==0)
			break;
		int x;
		for(int i=1;i<=n;i++)
		{
			cin>>x;
			c[x]++;
		}
		int score;
		cin>>score;
		cout<<c[score]<<endl;
	}
	return 0;
}