g0601_0700.s0659_split_array_into_consecutive_subsequences

Class Solution

java.lang.Object

g0601_0700.s0659_split_array_into_consecutive_subsequences.Solution

public class Solution
extends Object

659 - Split Array into Consecutive Subsequences.

Medium

You are given an integer array nums that is sorted in non-decreasing order.

Determine if it is possible to split nums into one or more subsequences such that both of the following conditions are true:

• Each subsequence is a consecutive increasing sequence (i.e. each integer is exactly one more than the previous integer).
• All subsequences have a length of 3 or more.

Return true if you can split nums according to the above conditions, or false otherwise.

A subsequence of an array is a new array that is formed from the original array by deleting some (can be none) of the elements without disturbing the relative positions of the remaining elements. (i.e., [1,3,5] is a subsequence of [1,2,3,4,5] while [1,3,2] is not).

Example 1:

Input: nums = [1,2,3,3,4,5]

Output: true

Explanation: nums can be split into the following subsequences:

[1,**2**,**3**,3,4,5] –> 1, 2, 3

[1,2,3,**3**,**4**,**5**] –> 3, 4, 5

Example 2:

Input: nums = [1,2,3,3,4,4,5,5]

Output: true

Explanation: nums can be split into the following subsequences:

[1,**2**,**3**,3,**4**,4,**5**,5] –> 1, 2, 3, 4, 5

[1,2,3,**3**,4,**4**,5,**5**] –> 3, 4, 5

Example 3:

Input: nums = [1,2,3,4,4,5]

Output: false

Explanation: It is impossible to split nums into consecutive increasing subsequences of length 3 or more.

Constraints:

• 1 <= nums.length <= 104
• -1000 <= nums[i] <= 1000
• nums is sorted in non-decreasing order.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	isPossible(int[] nums)

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

isPossible

public boolean isPossible(int[] nums)