Package g2401_2500.s2407_longest_increasing_subsequence_ii

Class Solution

java.lang.Object

g2401_2500.s2407_longest_increasing_subsequence_ii.Solution

public class Solution
extends Object

2407 - Longest Increasing Subsequence II.<p>Hard</p> <p>You are given an integer array <code>nums</code> and an integer <code>k</code>.</p> <p>Find the longest subsequence of <code>nums</code> that meets the following requirements:</p> <ul> <li>The subsequence is <strong>strictly increasing</strong> and</li> <li>The difference between adjacent elements in the subsequence is <strong>at most</strong> <code>k</code>.</li> </ul> <p>Return <em>the length of the <strong>longest</strong> <strong>subsequence</strong> that meets the requirements.</em></p> <p>A <strong>subsequence</strong> is an array that can be derived from another array by deleting some or no elements without changing the order of the remaining elements.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> nums = [4,2,1,4,3,4,5,8,15], k = 3</p> <p><strong>Output:</strong> 5</p> <p><strong>Explanation:</strong></p> <p>The longest subsequence that meets the requirements is [1,3,4,5,8].</p> <p>The subsequence has a length of 5, so we return 5.</p> <p>Note that the subsequence [1,3,4,5,8,15] does not meet the requirements because 15 - 8 = 7 is larger than 3.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> nums = [7,4,5,1,8,12,4,7], k = 5</p> <p><strong>Output:</strong> 4</p> <p><strong>Explanation:</strong></p> <p>The longest subsequence that meets the requirements is [4,5,8,12].</p> <p>The subsequence has a length of 4, so we return 4.</p> <p><strong>Example 3:</strong></p> <p><strong>Input:</strong> nums = [1,5], k = 1</p> <p><strong>Output:</strong> 1</p> <p><strong>Explanation:</strong> The longest subsequence that meets the requirements is [1]. The subsequence has a length of 1, so we return 1.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= nums.length <= 10⁵</code></li> <li><code>1 <= nums[i], k <= 10⁵</code></li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	lengthOfLIS(int[] nums, int k)

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

lengthOfLIS

public int lengthOfLIS(int[] nums,
 int k)