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g2701_2800.s2762_continuous_subarrays.readme.md Maven / Gradle / Ivy

2762\. Continuous Subarrays

Medium

You are given a **0-indexed** integer array `nums`. A subarray of `nums` is called **continuous** if:

*   Let `i`, `i + 1`, ..., `j` be the indices in the subarray. Then, for each pair of indices i <= 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:** 8

**Explanation:** 

Continuous subarray of size 1: [5], [4], [2], [4]. 

Continuous subarray of size 2: [5,4], [4,2], [2,4]. 

Continuous subarray of size 3: [4,2,4]. 

Thereare no subarrys of size 4. 

Total continuous subarrays = 4 + 3 + 1 = 8. 

It can be shown that there are no more continuous subarrays.

**Example 2:**

**Input:** nums = [1,2,3]

**Output:** 6

**Explanation:** 

Continuous subarray of size 1: [1], [2], [3]. 

Continuous subarray of size 2: [1,2], [2,3]. 

Continuous subarray of size 3: [1,2,3]. 

Total continuous subarrays = 3 + 2 + 1 = 6.

**Constraints:**

*   1 <= nums.length <= 105
*   1 <= nums[i] <= 109