Input: arr = [1,0,2,3,0,4,5,0]
Output: [1,0,0,2,3,0,0,4]
Explanation: After calling your function, the input array is modified to: [1,0,0,2,3,0,0,4]

Input: arr = [1,2,3]
Output: [1,2,3]
Explanation: After calling your function, the input array is modified to: [1,2,3]

public class Solution {
   public void duplicateZeros(int[] arr) {
        int n = arr.length;
        for(int i = 0; i < n; i ++){
            if(arr[i] == 0 && i + 1 < n){
                for(int j = arr.length - 1; j > i; j --){
                    arr[j] = arr[j - 1];
                }

                i ++;
            }
        }
    }
}