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文章目录
  1. 题目介绍
  2. 复杂度
  3. 解题思路

Moving Average from Data Stream

题目介绍

LeetCode 346. Moving Average from Data Stream

复杂度

时间复杂度:O(1),空间复杂度:O(n)

解题思路

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class MovingAverage {

var data: [Int]
var size: Int
var sum: Int

/** Initialize your data structure here. */
init(_ size: Int) {
data = []
self.size = size
sum = 0
}

func next(_ val: Int) -> Double {
if data.count == size {
sum -= data[0]
data.remove(at: 0)
}
sum += val
data.append(val)
return (Double)(sum)/(Double)(data.count)
}
}

/**
* Your MovingAverage object will be instantiated and called as such:
* let obj = MovingAverage(size)
* let ret_1: Double = obj.next(val)
*/
**版权声明**

Ivan’s Blog by Ivan Ye is licensed under a Creative Commons BY-NC-ND 4.0 International License.
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