Make Array Zero by Subtracting Equal Amounts LeetCode solution in Java

1
class Solution {
2
  public int minimumOperations(int[] nums) {
3
    Set<Integer> s = new HashSet<>();
4
    int result = 0;
5
    if (nums[0] == 0 && nums.length == 1) {
6
      return 0;
7
    } else {
8
      for (int num : nums) {
9
        s.add(num);
10
      }
11
      for (int num : nums) {
12
        s.remove(0);
13
      }
14
      result = s.size();
15
      ;
16
    }
17
    return result;
18
  }
19
}