Project Euler - Problem 16

euler.java

package euler;

import java.math.BigInteger;

public class BigPow {
	public static void main(String[] args) {
		BigInteger n = BigInteger.valueOf(2).pow(1000);
		System.out.println(sum(n.toString()));
	}
	
	public static int sum(String s) {
		int sum = 0;
		for (int i = 0; i < s.length(); i++) {
			sum += s.charAt(i) - 48;
		}
		return sum;
	}
}