26 lines
899 B
Python
26 lines
899 B
Python
# Time: O(N)
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# Space: O(1)
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class Solution:
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def findMaxAverage(self, nums: List[int], k: int) -> float:
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# Sliding window approach
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max_average = float("-inf")
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moving_sum = 0.0
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window_start = 0
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for i in range(0, len(nums)):
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moving_sum += nums[i]
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# Need to start computing averages only at this point.
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# e.g. Suppose nums = [0, 1, 2, 3] and k = 3
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if i >= k - 1:
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# e.g. When i = 3 - 1 = 2, start checking for max average
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max_average = max(moving_sum / k, max_average)
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# e.g. Remove element at beginning of window, i.e 0 from [0...2]
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moving_sum -= nums[window_start]
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# e.g. Move window position from 0 to 1
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window_start += 1
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return max_average
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