PriceList = []
N = eval(input("請輸入計算次數:"))
Weight = (2 / (N + 1))
for i in range(1,N+1):
    PriceNum = "請輸入第"+str(i)+"次的近期價格:"
    Price = eval(input(PriceNum))
    EMAPrice = (Price * ((1 - Weight) ** (i - 1)))
    PriceList.append(EMAPrice)
EMA = (Weight * sum(PriceList))
print("EMA = ",EMA)