easyArrayHash Table 0 views
Unique Number of Occurrences
Given an array of integers arr, return true if the number of occurrences of each value in the array is unique or false otherwise.
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
Constraints
- 1 <= arr.length <= 1000
- -1000 <= arr[i] <= 1000
Hints
Companies
No companies reported yet.
Discussion
Sign in to join the discussion.
Loading discussion...
Test results
No test cases yet.