#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    for(long i=n;i>0;i--)
    {
        n*=n-i;
    }
    return n;// Return the number of ways to fill in the array.
}

int main() {
    int n;
    int k;
    int x;
    if(n>=3 && n<=10^5 && k>=2 && k<=10^5 && x>=1 && x<=k)
    {
    }
    else()
    {
        break();
    }
    cin >> n >> k >> x;
    long answer = countArray(n, k, x);
    cout << answer << endl;
    return 0;
}