#1343

Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold

pupil · 530 · lc medium +28 · verified · 72.3% accepted · 1,831 likes · top 82%

Description

Given an integer array arr and integers k and threshold, count the number of contiguous subarrays of length exactly k whose average is greater than or equal to threshold.

Example 1:

Input: arr = [2,2,2,2,5,5,5,8], k = 3, threshold = 4

Output: 3

Explanation: Sub-arrays [2,5,5],[5,5,5] and [5,5,8] have averages 4, 5 and 6 respectively. All other sub-arrays of size 3 have averages less than 4 (the threshold).

Example 2:

Input: arr = [11,13,17,23,29,31,7,5,2,3], k = 3, threshold = 5

Output: 6

Explanation: The first 6 sub-arrays of size 3 have averages greater than 5. Note that averages are not integers.

Code

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class Solution:
    def numOfSubarrays(self, arr: List[int], k: int, threshold: int) -> int:

class Solution:
    def numOfSubarrays(self, arr: List[int], k: int, threshold: int) -> int: