#include <iostream>
using namespace std;
int main() {
int n;
int p;
int k;
int cnt = 0;
cin >> n >> k >> p;
int arr[n*k];
for(int i = 0;i < n;i++)
cin >> arr[i];
for(int i = 0;i < n;i++)
if(arr[i]=0)
cnt++;
if(cnt >= p)
cout << 0;
else
cout << cnt % k;
return 0;
}
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