British computer magazine had a programming contest [ Updated ]

Friend ( Rishitesh Mishra ) suggested to increment counter by 9, as he believe that 9 is magic number and to my surprise I could get the result in less than a second.

package avdongre.bcm.puzzle;

import java.util.Arrays;

public class Solution {
	public static void main(String[] args) {
		long start = java.util.Calendar.getInstance().getTimeInMillis();
		int[] set = new int[10];
		int counter = 0;
		boolean solutionFound = false;
		for (int i = 123456789; i < 987654321; i = i + 9) {
			if (solutionFound) {
				break;
			}
			Arrays.fill(set, 0);
			int temp = i;
			boolean validNumber = true;
			while (temp != 0) {
				int digit = temp % 10;
				if (digit == 0) {
					validNumber = false;
					break;
				}
				if (set[digit] == 0) {
					set[digit] = 1;
				} else {
					validNumber = false;
					break;
				}
				temp /= 10;
			}
			if (validNumber) {
				counter++;
				if (counter == 100000) {
					System.out.println(i);
					solutionFound = true;
				}
			}
		}
		long end = java.util.Calendar.getInstance().getTimeInMillis();
		System.out.println("it took this long to complete this stuff: "
				+ ((end - start) * 0.001) + " seconds");
	}
}

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