UVA 10268 Java

import java.util.*;
public class main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextLine())
        {
        	int x = Integer.parseInt(sc.nextLine());
        	String[] str = sc.nextLine().split(" ");
        	//System.out.println(x);
        	int output = 0;
        	for(int i = 0; i < str.length - 1; i++)
        	{
        		int n = Integer.parseInt(str[i]);
        		output += n * Math.pow(x, str.length -2 -i) * (str.length -1 -i);
        	}
        	System.out.println(output);
        }
    }
};