题解 | #求小球落地5次后所经历的路程和第5次反弹的高度#

等比数列

def getAns(ini, times):
    
    heights = [ini*(0.5**n) for n in range(times + 1)]
    sums = [0] * (times + 1)
    sums[0] = ini
    for i in range(1,times):
        sums[i] = sums[i-1] + 2*heights[i]
    print(sums[times - 1])
    print(heights[times])
while True:
    try:
        ini = int(input())
        getAns(ini, 5)
    except:
        break