Level 3Exercise #54

Anagram in linear time

Decide whether two strings are anagrams without sorting.

What you’ll practice

This Level 3 exercise focuses on Counter equality in the Collections curriculum. Solve the challenge prompt above using clear, idiomatic Python and the relevant language or standard-library tools.

Relevant Python reference: collections.Counter.

Sample Test Cases

Example #1

Input:are_anagrams('listen', 'silent')

Output:True

Reference Solution

Reveal Reference Solution

def are_anagrams(left: str, right: str) -> bool:
    from collections import Counter
    return Counter(left) == Counter(right)

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Anagram in linear time

What you’ll practice

Sample Test Cases

Further Reading

Reference Solution