#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;

ll last[200005]={-1};
int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
    
	ll n,k,x;
	cin>>n>>k>>x;
	
	int a[n];
	for(int i=0;i<n;i++){
		a[i]=-1;
	}
	
	a[0]=1;
	a[n-1]=x;
	
	ll sum=0;
	ll count=k;
	for(int i=n-2;i>=1;i--)
	{
		if(a[i-1]==-1){
			sum=sum+k-1;
		}
		else
		sum=sum+k-2;
	}
	
	cout<<sum<<endl;
	
	
}