Given a stream of integers and a window size, calculate the moving average of all integers in the sliding window. Implement the MovingAverage class:
MovingAverage(int size) Initializes the object with the size of the window size. double next(int val) Returns the moving average of the last size values of the stream.
Example 1: Input [“MovingAverage”, “next”, “next”, “next”, “next”] [[3], [1], [10], [3], [5]] Output [null, 1.0, 5.5, 4.66667, 6.0]
Explanation MovingAverage movingAverage = new MovingAverage(3); movingAverage.next(1); // return 1.0 = 1 / 1 movingAverage.next(10); // return 5.5 = (1 + 10) / 2 movingAverage.next(3); // return 4.66667 = (1 + 10 + 3) / 3 movingAverage.next(5); // return 6.0 = (10 + 3 + 5) / 3
- code
class MovingAverage:
def __init__(self, size: int):
self.q = deque()
self.size = size
def next(self, val: int) -> float:
if len(self.q) < self.size:
self.q.append(val)
else:
self.q.popleft()
self.q.append(val)
return sum(self.q) / len(self.q)
# Your MovingAverage object will be instantiated and called as such:
# obj = MovingAverage(size)
# param_1 = obj.next(val)