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Grokking the Coding Interview Patterns in C++

Solution: Sort Array by Increasing Frequency

Explore how to sort an integer array by increasing frequency while breaking ties by descending value. Understand how to build a frequency map with Counter and apply composite sorting keys to solve multi-criteria sorting problems efficiently.

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Statement

Given an array of integers nums, sort the array in increasing order based on the frequency of each value. If multiple values share the same frequency, sort those values in decreasing order.

Return the sorted array.

Constraints:

  • 1≤1 \leq nums.length ≤100\leq 100

  • −100≤-100 \leq ...