#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

long int countArray(int n, int k, int x) {
    // Return the number of ways to fill in the array.
    long int a[n],i,p=0;
    for(i=0;i<n;i++)
    {
        if(i==0)
            a[i]=1;
        else if(i==n-1)
            a[i]=x;
        else if(i==1)
            p=p+(k-1);
            else if(i==n-2&&(n-3)!=1)
                p=p+(k-1);
              else p=p+1; 
                
            
    }
    return p;
}

int main() {
    int n; 
    int k; 
    int x; 
    scanf("%i %i %i", &n, &k, &x);
    long int answer = countArray(n, k, x);
    printf("%ld\n", answer);
    return 0;
}