Group Anagrams
mediumGiven an array of strings `strs`, group the anagrams together. You can return the answer in any order.
An **Anagram** is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.
Example 1
Input: strs = ["eat","tea","tan","ate","nat","bat"]
Output: [["bat"],["nat","tan"],["ate","eat","tea"]]
Explanation: The groups of anagrams are: ["eat","tea","ate"], ["tan","nat"], and ["bat"].
Example 2
Input: strs = [""]
Output: [[""]]
Explanation: A single empty string forms its own group.
Example 3
Input: strs = ["a"]
Output: [["a"]]
Explanation: A single character forms its own group.
Constraints
1 <= strs.length <= 10^40 <= strs[i].length <= 100strs[i] consists of lowercase English letters.
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Test Cases
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