Solution: Group Anagrams
Explore how to group strings that are anagrams by tracking character frequencies. This lesson teaches you to implement an optimized C++ solution using a hash map keyed by letter frequency counts, improving on the naive sorting method. Understand the trade-offs in time and space complexity while solving the problem effectively.
Statement
Given a list of strings strs, group together all strings that are anagrams of each other.
An anagram is a string formed by rearranging the letters of another string, using all original letters exactly once. For example, “eat”, “tea”, and “ate” are anagrams.
Return a list of groups, where each group contains strings that are anagrams of each other.
Note: The order of the groups and the order of strings within each group does not matter.
Constraints:
Let strs be the list of strings given as input to find the anagrams.
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strs.length