Class Solution
java.lang.Object
g1201_1300.s1207_unique_number_of_occurrences.Solution
1207 - Unique Number of Occurrences.
Easy
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
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Constructor Summary
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Method Summary
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Constructor Details
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Solution
public Solution()
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Method Details
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uniqueOccurrences
public boolean uniqueOccurrences(int[] arr)
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