Package g2301_2400.s2341_maximum_number_of_pairs_in_array

Class Solution

java.lang.Object
g2301_2400.s2341_maximum_number_of_pairs_in_array.Solution
public class Solution extends java.lang.Object
2341 - Maximum Number of Pairs in Array.

Easy

You are given a 0-indexed integer array nums. In one operation, you may do the following:

  • Choose two integers in nums that are equal.
  • Remove both integers from nums, forming a pair.

The operation is done on nums as many times as possible.

Return a 0-indexed integer array answer of size 2 where answer[0] is the number of pairs that are formed and answer[1] is the number of leftover integers in nums after doing the operation as many times as possible.

Example 1:

Input: nums = [1,3,2,1,3,2,2]

Output: [3,1]

Explanation:

Form a pair with nums[0] and nums[3] and remove them from nums. Now, nums = [3,2,3,2,2].

Form a pair with nums[0] and nums[2] and remove them from nums. Now, nums = [2,2,2].

Form a pair with nums[0] and nums[1] and remove them from nums. Now, nums = [2].

No more pairs can be formed. A total of 3 pairs have been formed, and there is 1 number leftover in nums.

Example 2:

Input: nums = [1,1]

Output: [1,0]

Explanation: Form a pair with nums[0] and nums[1] and remove them from nums. Now, nums = [].

No more pairs can be formed. A total of 1 pair has been formed, and there are 0 numbers leftover in nums.

Example 3:

Input: nums = [0]

Output: [0,1]

Explanation: No pairs can be formed, and there is 1 number leftover in nums.

Constraints:

  • 1 <= nums.length <= 100
  • 0 <= nums[i] <= 100

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    int[]
    numberOfPairs(int[] nums)
     

    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

    • numberOfPairs

      public int[] numberOfPairs(int[] nums)