#include <iostream>
using namespace std;
#define LL long long
int main(){
    LL x,n,num=1;
    cin>>x>>n;
    for(LL i=0;i<n;i++)
        num=num*x+num;
    if(x==0){
        cout<<0<<endl;
        return 0;
    }
    cout<<num<<endl;
    return 0;
}