Given an integer array nums, return true if there exists a triple of indices (i, j, k) such that i < j < k and nums[i] < nums[j] < nums[k]. If no such indices exists, return false.
Examples
Example 1
Input: nums = [1,2,3,4,5]
Output: true
Explanation: Any triplet where i < j < k is valid.
Example 2
Input: nums = [5,4,3,2,1]
Output: false
Explanation: No triplet exists.
Example 3
Input: nums = [2,1,5,0,4,6]
Output: true
Explanation: The triplet (3, 4, 5) is valid because nums[3] == 0 < nums[4] == 4 < nums[5] == 6.
Constraints
1 <= nums.length <= 5 * 105
-231 <= nums[i] <= 231 - 1
334. Increasing Triplet Subsequence
Medium
30 Points
Array
Greedy
Given an integer array nums, return true if there exists a triple of indices (i, j, k) such that i < j < k and nums[i] < nums[j] < nums[k]. If no such indices exists, return false.
Examples
Example 1
Input: nums = [1,2,3,4,5]
Output: true
Explanation: Any triplet where i < j < k is valid.
Example 2
Input: nums = [5,4,3,2,1]
Output: false
Explanation: No triplet exists.
Example 3
Input: nums = [2,1,5,0,4,6]
Output: true
Explanation: The triplet (3, 4, 5) is valid because nums[3] == 0 < nums[4] == 4 < nums[5] == 6.
Constraints
1 <= nums.length <= 5 * 105
-231 <= nums[i] <= 231 - 1
Increasing Triplet Subsequence - Practice Coding | SlaveCode