PSDS Max Distance

import java.util.Random;

public class Solution {

    public static int maxDistance(int[] arr) {
        int[] minIdxs = new int[arr.length];
        minIdxs[0] = 0;
        for (int i = 1; i < arr.length; ++i) {
            minIdxs[i] = arr[i] < arr[minIdxs[i - 1]] ? i : minIdxs[i - 1];
        }
        int[] maxIdxs = new int[arr.length];
        maxIdxs[arr.length - 1] = arr.length - 1;
        for (int i = arr.length - 2; i >= 0; --i) {
            maxIdxs[i] = arr[i] > arr[maxIdxs[i + 1]] ? i : maxIdxs[i + 1];
        }
        int result = -1;
        for (int i = arr.length - 1, j = arr.length - 1; i >= 0 && j >= 0;) {
            if (minIdxs[i] != maxIdxs[j] && arr[minIdxs[i]] <= arr[maxIdxs[j]]) {
                result = Math.max(result, j - i);
                --i;
            } else {
                --j;
            }
        }
        return result;
    }

    public static void main(String[] args) {
        System.out.println(maxDistance(new int[]{6, 1, 5, 7, 4, 2}));
        System.out.println(maxDistance(new int[]{6, 1, 5, 7, 4, 3}));
        System.out.println(maxDistance(new int[]{6, 3, 5, 7, 4, 2}));
        System.out.println(maxDistance(new int[]{3, 5, 4, 2}));
        System.out.println(maxDistance(new int[]{34, 8, 10, 3, 2, 80, 30, 33, 1}));
        System.out.println(maxDistance(new int[]{9, 2, 3, 4, 5, 6, 7, 8, 18, 0}));
        System.out.println(maxDistance(new int[]{1, 2, 3, 4, 5, 6}));
        System.out.println(maxDistance(new int[]{6, 5, 4, 3, 2, 1}));
        Random random = new Random();
        int[] arr = new int[10];
        for (int i = 0; i < 10; ++i) {
            for (int j = 0; j < 10; ++j) {
                arr[j] = Math.abs(random.nextInt()) % 20;
                System.out.print(arr[j] + " ");
            }
            System.out.println(" => " + maxDistance(arr));
        }
    }
}