#include <bits/stdc++.h>
using namespace std;
const int N = 110;
int cnt[N];
int main(){
int n;
while (cin >> n){
if (n == 0) break;
for (int i=0; i<n; i++){
int grade;
cin >> grade;
cnt[grade] ++;
}
int query;
cin >> query;
printf("%d\n", cnt[query]);
}
return 0;
}



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