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Grokking the Coding Interview Patterns in C#

Solution: Unique Number of Occurrences

Explore how to determine if each number in an array has a unique number of occurrences by applying hash maps and hash sets. Understand the step-by-step solution and analyze its efficiency in terms of time and space complexity to enhance your coding interview skills.

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Statement

Given an array of integers nums, return TRUE if each value in the array has a unique number of occurrences; otherwise, return FALSE.

Constraints:

  • 11<= nums.length <=10001000

  • −1000-1000 <= nums[i] <= 10001000

Solution

The algorithm checks if there is a unique number of ...