a !== b, the longer one must be the other one’s
Given two strings
b, return the
length of the
longest uncommon subsequence between a and b. If the longest uncommon subsequence does not exist, return
An uncommon subsequence between two strings is a string that is a
subsequence of one but not the other.
subsequence of a string s is a string that can be obtained after deleting any number of characters from s.
- For example, “abc” is a subsequence of “aebdc” because you can delete the underlined characters in “aebdc” to get “abc”. Other subsequences of “aebdc” include “aebdc”, “aeb”, and “” (empty string).
Input: a = "aba", b = "cdc"