Solve this question and you are smart

Revision en1, by Invn1234, 2023-09-06 18:07:15

Given an array of integers arr, return true if the number of occurrences of each value in the array is unique or false otherwise.

Example 1:

Input: arr = [1,2,2,1,1,3] Output: true Explanation: The value 1 has 3 occurrences, 2 has 2 and 3 has 1. No two values have the same number of occurrences. Example 2:

Input: arr = [1,2] Output: false Example 3:

Input: arr = [-3,0,1,-3,1,1,1,-3,10,0] Output: true

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en1 English Invn1234 2023-09-06 18:07:15 463 Initial revision (published)