Add_to_array_form_of_integer.java

class Solution {
    public List<Integer> addToArrayForm(int[] num, int k) {
        List<Integer> list = new ArrayList<>();
        
        for(int i=num.length-1;i>=0;i--){
            list.add((num[i]+k)%10);
            k = (num[i]+k)/10;
           
        }
        
        
        while(k>0){
            
           list.add(k%10);
           k=k/10;
            
        }
        Collections.reverse(list);
        return list;
        }

    }