930. Binary Subarrays With Sum LeetCode Solution | Easy Approach

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Binary Subarrays With Sum Given a binary array nums and an integer goal, return the number of non-empty subarrays with a sum goal.

subarray is a contiguous part of the array.

Example 1:

Input: nums = [1,0,1,0,1], goal = 2
Output: 4
Explanation: The 4 subarrays are bolded and underlined below:
[1,0,1,0,1]
[1,0,1,0,1]
[1,0,1,0,1]
[1,0,1,0,1]

Example 2:

Input: nums = [0,0,0,0,0], goal = 0
Output: 15

Constraints:

  • 1 <= nums.length <= 3 * 104
  • nums[i] is either 0 or 1.
  • 0 <= goal <= nums.length

Binary Subarrays With Sum Solutions

Time: O(n)
Space: O(n)

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