Package g2101_2200.s2161_partition_array_according_to_given_pivot

Class Solution

java.lang.Object

g2101_2200.s2161_partition_array_according_to_given_pivot.Solution

public class Solution
extends java.lang.Object

2161 - Partition Array According to Given Pivot.

Medium

You are given a 0-indexed integer array nums and an integer pivot. Rearrange nums such that the following conditions are satisfied:

• Every element less than pivot appears before every element greater than pivot.
• Every element equal to pivot appears in between the elements less than and greater than pivot.
• The relative order of the elements less than pivot and the elements greater than pivot is maintained.
  • More formally, consider every pi, pj where pi is the new position of the ith element and pj is the new position of the jth element. For elements less than pivot, if i < j and nums[i] < pivot and nums[j] < pivot, then pi < pj. Similarly for elements greater than pivot, if i < j and nums[i] > pivot and nums[j] > pivot, then pi < pj.

Return nums after the rearrangement.

Example 1:

Input: nums = [9,12,5,10,14,3,10], pivot = 10

Output: [9,5,3,10,10,12,14]

Explanation: The elements 9, 5, and 3 are less than the pivot so they are on the left side of the array.

The elements 12 and 14 are greater than the pivot so they are on the right side of the array.

The relative ordering of the elements less than and greater than pivot is also maintained.

[9, 5, 3] and [12, 14] are the respective orderings.

Example 2:

Input: nums = [-3,4,3,2], pivot = 2

Output: [-3,2,4,3]

Explanation: The element -3 is less than the pivot so it is on the left side of the array.

elements 4 and 3 are greater than the pivot so they are on the right side of the array.

The relative ordering of the elements less than and greater than pivot is also maintained.

[-3] and [4, 3] are the respective orderings.

Constraints:

• 1 <= nums.length <= 105
• -106 <= nums[i] <= 106
• pivot equals to an element of nums.

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int[]	pivotArray(int[] nums, int pivot)

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

pivotArray

public int[] pivotArray(int[] nums,
 int pivot)