public static int equalStacks(List<Integer> h1, List<Integer> h2, List<Integer> h3) {
        int s1 = h1.stream().mapToInt(x -> x.intValue()).sum();
        int s2 = h2.stream().mapToInt(x -> x.intValue()).sum();
        int s3 = h3.stream().mapToInt(x -> x.intValue()).sum();
        Collections.reverse(h1);
        Collections.reverse(h2);
        Collections.reverse(h3);
        while(s1 != s2 || s2 != s3){
            if(s1 > s2 || s1 > s3){
                s1 -= h1.remove(h1.size() - 1);
            }
            
            if(s2 > s1 || s2 > s3){
                s2 -= h2.remove(h2.size() - 1);
            }
            
            if(s3 > s2 || s3 > s1){
                s3 -= h3.remove(h3.size() - 1);
            }
            
        }
        return s1;
    }