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g0501_0600.s0522_longest_uncommon_subsequence_ii.readme.md Maven / Gradle / Ivy

522\. Longest Uncommon Subsequence II

Medium

Given an array of strings `strs`, return _the length of the **longest uncommon subsequence** between them_. If the longest uncommon subsequence does not exist, return `-1`.

An **uncommon subsequence** between an array of strings is a string that is a **subsequence of one string but not the others**.

A **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).

**Example 1:**

**Input:** strs = ["aba","cdc","eae"]

**Output:** 3

**Example 2:**

**Input:** strs = ["aaa","aaa","aa"]

**Output:** -1

**Constraints:**

*   `2 <= strs.length <= 50`
*   `1 <= strs[i].length <= 10`
*   `strs[i]` consists of lowercase English letters.