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 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 and Description
Solution()

Method Summary

Modifier and Type	Method and Description
int	minSetSize(int[] arr)

Methods inherited from class java.lang.Object

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

Constructor Detail

Solution

public Solution()

Method Detail

minSetSize

public int minSetSize(int[] arr)