Problem 64:Group Anagrams[Amazon]
Strings, Hashing, and Dictionary. I broke Leetcode with this solution.
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Have you ever written a solution so good, you broke Leetcode?
If you think I’m joking take a look-
This problem can be found as problem 49. Group Anagrams
Problem
Given 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"]]
Example 2:
Input: strs = [""]
Output: [[""]]
Example 3:
Input: strs = ["a"]
Output: [["a"]]
Constraints:
1 <= strs.length <= 104
0 <= strs[i].length <= 100
strs[i]
consists of lowercase English letters.
Just a heads-up for this problem. I saw a lot of code online used sorting for this (Leetcode will even accept it and rank those solutions highly). However, sorting is slow if you have very large strings in your input list (I’m guessing Leetcode had mostly small strings in their test cases). There is a variant with a lower big O complexity.
You can test your solution here
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