Package g1301_1400.s1338_reduce_array_size_to_the_half

Class Solution

java.lang.Object
g1301_1400.s1338_reduce_array_size_to_the_half.Solution
public class Solution extends java.lang.Object
1338 - Reduce Array Size to The Half.

Medium

You are given an integer array arr. You can choose a set of integers and remove all the occurrences of these integers in the array.

Return the minimum size of the set so that at least half of the integers of the array are removed.

Example 1:

Input: arr = [3,3,3,3,5,5,5,2,2,7]

Output: 2

Explanation: Choosing {3,7} will make the new array [5,5,5,2,2] which has size 5 (i.e equal to half of the size of the old array).

Possible sets of size 2 are {3,5},{3,2},{5,2}.

Choosing set {2,7} is not possible as it will make the new array [3,3,3,3,5,5,5] which has a size greater than half of the size of the old array.

Example 2:

Input: arr = [7,7,7,7,7,7]

Output: 1

Explanation: The only possible set you can choose is {7}. This will make the new array empty.

Constraints:

  • 2 <= arr.length <= 105
  • arr.length is even.
  • 1 <= arr[i] <= 105

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    minSetSize(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

    • minSetSize

      public int minSetSize(int[] arr)