Continuous Subarrays
You are given a 0-indexed integer array nums. A subarray of nums is called continuous if:
- Let
i,i + 1, ...,jbe the indices in the subarray. Then, for each pair of indicesi <= i1, i2 <= j,0 <= |nums[i1] - nums[i2]| <= 2.
Return the total number of continuous subarrays.
A subarray is a contiguous non-empty sequence of elements within an array.
Example 1
Input
nums = [5,4,2,4]Output
8There are 4 continuous subarrays of size 1, 3 of size 2, 1 of size 3, and none of size 4, for a total of 8.
Example 2
Input
nums = [1,2,3]Output
6All subarrays are continuous, giving 3 subarrays of size 1, 2 of size 2, and 1 of size 3, for a total of 6.
Constraints
- 1 <= nums.length <= 10^5
- 1 <= nums[i] <= 10^9