Package g1201_1300.s1207_unique_number_of_occurrences

Class Solution

java.lang.Object

g1201_1300.s1207_unique_number_of_occurrences.Solution

public class Solution
extends Object

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`

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
boolean	uniqueOccurrences(int[] arr)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

uniqueOccurrences

public boolean uniqueOccurrences(int[] arr)