Coding

Sort a String by Frequency

Sort a string by the frequency of its characters.

Input: s = "cccaaa"

Output: "cccaaa" or "aaaccc"

Explanation: Both 'c' and 'a' appear three times, so sorting them by descending frequency keeps them grouped equally.

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Interview question asked to Software Engineers interviewing at Jamf, Medallia, Myntra and other companies. Original question asked: Sort a String by Frequency.