#include<cstdio>
#include<iostream>
using namespace std;
int main()
{
	unsigned long long x,n,s=1;
	cin>>x>>n;
	if(n==1)
	{
	    cout<<s;
	    return 0;
	}
	for(int i=1;i<=n;i++)
	{
		int a=s;
	    s*=x;
		s+=a;
	}
	cout<<s;
	return 0;
}