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

class Solution:
    def numOfSubarrays(self, nums: List[int], k: int, threshold: int) -> int:
        currSum = 0
        start = 0
        end = 0
        count = 0
        
        # run right pointer till end element
        for end in range(len(nums)):
            # update value to window
            currSum += nums[end]
            
            # check if window size achieved
            if (end - start + 1) == k:
                # is average > target val
                if (currSum // k) >= threshold:
                    count += 1
                # slide the window
                currSum -= nums[start]
                start += 1
            
            
        return count