itugs

public class Solution {
    static int[] hackerCards(int[] collection, int d) {
        List<Integer> result = new ArrayList<>();
        int s, e;
        for(int idx = 0; idx <= collection.length; idx++) {
            if (idx == 0) s = 1; else s = collection[idx-1] + 1;
            if (idx != collection.length) e = collection[idx]; else e = Integer.MAX_VALUE;
            if (d < s) break;
            for (int k = s; k < e; k++) {
                if (k <= d) {