Project Euler #30: Digit Nth powers

Question

Surprisingly there are only three numbers that can be written as the sum of fourth powers of their digits:

1634 = 1⁴ + 6⁴ + 3⁴ + 4⁴
8208 = 8⁴ + 2⁴ + 0⁴ + 8⁴
9474 = 9⁴ + 4⁴ + 7⁴ + 4⁴

As 1 = 1⁴ is not a sum it is not included.

The sum of these numbers is 1634 + 8208 + 9474 = 19316.
Find the sum of all the numbers that can be written as the sum of fifth powers of their digits.

Answer : 443839

Hacker Rank Problem

Solution

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import java.util.*; public class Solution { public static void main(String[] args) { int n=new Scanner(System.in).nextInt(); long sum=0; for(long i=(long)Math.pow(10,0);i<=(long)2*Math.pow(10,n);i++) { String ok=""+i; int add=0; for(int j=0;j<ok.length();j++) { add+=(long)Math.pow(Integer.valueOf(""+ok.charAt(j)),n); } if(add==i &&i!=1) { sum+=i; } } System.out.println(sum); } }