2348. Number of Zero-Filled Subarrays

Medium

2K

67

Given an integer array `nums`

, return *the number of subarrays filled with *

`0`

.A **subarray** is a contiguous non-empty sequence of elements within an array.

**Example 1:**

Input:nums = [1,3,0,0,2,0,0,4]Output:6Explanation:There are 4 occurrences of [0] as a subarray. There are 2 occurrences of [0,0] as a subarray. There is no occurrence of a subarray with a size more than 2 filled with 0. Therefore, we return 6.

**Example 2:**

Input:nums = [0,0,0,2,0,0]Output:9Explanation:There are 5 occurrences of [0] as a subarray. There are 3 occurrences of [0,0] as a subarray. There is 1 occurrence of [0,0,0] as a subarray. There is no occurrence of a subarray with a size more than 3 filled with 0. Therefore, we return 9.

**Example 3:**

Input:nums = [2,10,2019]Output:0Explanation:There is no subarray filled with 0. Therefore, we return 0.

**Constraints:**

`1 <= nums.length <= 10`

^{5}`-10`

^{9}<= nums[i] <= 10^{9}

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