Problem 30

Turned integer into a string, took each character and did the operations added the powers that way. Then I just checked the numbers if they were equal.

/** 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. */ import java.util.*; public class problem29 { public static boolean isDigitFifth(int num){ String strNum = Integer.toString(num); int sum = 0; for(int i = 0; i < strNum.length(); i++) { sum += Math.pow( Integer.parseInt( Character.toString( strNum.charAt(i))),5); } if(sum == num) return true; else return false; } public static void main(String[] args) { int sum = 0; for(int i = 2; i < 1000000; i++) { if(isDigitFifth(i)){ sum += i; System.out.println(i); } } System.out.println(sum); } }

**Output**

——————–Configuration:

4150

4151

54748

92727

93084

194979

443839

Process completed.