#include <bits/stdc++.h>

using namespace std;

long countArray(int n, int k, int x) {
    int a[n],count=0;
    a[0]=1;
    a[n-1]=x;
    for(int i=1;i<n-1;i++)
    {
        for(int j=1;j<=k;j++)
        {
            if(j!=1&&i==1)
        {
            a[i]=j;
                count++;
        }
            if(j!=x&&i==(n-2))
            {
                a[i]=j;
                count++;
            }
    }
}
    count=count-1;
    return count;
}
int main() {
    int n;
    int k;
    int x;
    cin >> n >> k >> x;
    long answer = countArray(n, k, x);
    cout << answer << endl;
    return 0;
}