Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold
Given an array of integers arr and two integers k and threshold, return the number of sub-arrays of size k and average greater than or equal to threshold.
Example 1
Input
arr = [2,2,2,2,5,5,5,8], k = 3, threshold = 4Output
3Sub-arrays [2,5,5], [5,5,5], and [5,5,8] have averages 4, 5, and 6 respectively, while all other sub-arrays of size 3 have averages less than 4.
Example 2
Input
arr = [11,13,17,23,29,31,7,5,2,3], k = 3, threshold = 5Output
6The first 6 sub-arrays of size 3 have averages greater than 5, and averages are not necessarily integers.
Constraints
- 1 <= arr.length <= 10^5
- 1 <= arr[i] <= 10^4
- 1 <= k <= arr.length
- 0 <= threshold <= 10^4