/*
 * Use a while loop to compute the sum of a number raised to it first n powers
 * eg 2^1+2^2+2^3+....
 * 
 * Created August 2023
 * @author gtowell
 */
public class SumPower {
    public static void main(String[] args) {
        int base = Integer.parseInt(args[0]); //the number to be raised to powers
        int powr = Integer.parseInt(args[1]); // the number of powers -- horrific name
        int power = 1;
        int basePower = base;
        int summ = 0;
        while (power < powr) {
            summ += basePower;
            basePower *= base;
            power++;
        }
        System.out.println(summ);
    }
}