#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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