#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    int l=n-2;
    int i,pro=1;
    for(i=k;i>=l;i--)
    {
        pro=pro*i;
        
    }
    return 3;
    // Return the number of ways to fill in the array.
}

int main() {
    int n;
    int k;
    int x;
    cin >> n >> k >> x;
    long answer = countArray(n, k, x);
    cout << answer << endl;
    return 0;
}