521. Longest Uncommon Subsequence I

// LeetCode URL: https://leetcode.com/problems/longest-uncommon-subsequence-i/
/**
 * Refer:
 * https://leetcode.com/problems/longest-uncommon-subsequence-i/discuss/99410/I-feel-this-problem-is-just-perfect-for-April-Fools'-day/103474
 *
 * Time Complexity: (min(A, B))
 *
 * Space Complexity: O(1)
 *
 * A = Length of string a. B = Length of string b.
 */
class Solution {
    public int findLUSlength(String a, String b) {
        if (a == null || b == null || a.equals(b)) {
            return -1;
        }
        return Math.max(a.length(), b.length());
    }
}