Solution: Unique Number of Occurrences
Explore how to use hash maps and hash sets to check if each integer in an array occurs a unique number of times. This lesson helps you understand the design and implementation of an efficient algorithm with O(N) time complexity, reinforcing key concepts in hash map operations and problem-solving strategies for coding interviews.
We'll cover the following...
We'll cover the following...
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:
<= nums.length<=<= nums[i]<=
Solution
The algorithm checks if there is a unique number of ...