Given an integer array nums, return the length of the longest strictly increasing subsequence.
- An array of integers
nums.
- 1 <= nums.length <= 2500
- -10^4 <= nums[i] <= 10^4
Input: nums = [10, 9, 2, 5, 3, 7, 101, 18]
Output: 4
Explanation: The longest increasing subsequence is [2, 3, 7, 101].