#521 - Longest Uncommon Subsequence I

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Problem Description

Given two strings a and b, return the length of the longest uncommon subsequence between a and b. If no such uncommon subsequence exists, return -1.

An uncommon subsequence between two strings is a string that is a subsequence of exactly one of them.

Solution

/**
 * @param {string} a
 * @param {string} b
 * @return {number}
 */
var findLUSlength = function(a, b) {
  return a === b ? -1 : Math.max(a.length, b.length);
};