程序填空题：三分非递归找假硬币 - 实验14 用三分法找假硬币 - 《Python编程基础及应用实验教程》- 高教社

三分非递归查找假硬币的算法请查询《Python编程基础及应用实验教程》实验14。

python
from math import ceil

def findFalseCoin(coins):
#查找范围：从idxStart下标开始的iLength个硬币
idxStart, iLength =
while True:
if iLength == 1:
return idxStart

n = ceil(iLength/3)
wPart1 = sum(coins[idxStart:idxStart+n])
wPart2 = sum(coins[])
wPart3 = sum(coins[])
if wPart1 < wPart2:
idxStart, iLength = idxStart, n
elif wPart1 > wPart2:
idxStart, iLength =
else:
idxStart, iLength =

if __name__ == '__main__':
coins = [100]*11

for i in range(len(coins)):
coinsCopy = coins[:]
coinsCopy[i] = 99
r = findFalseCoin()
print(f'False coin idx:{r}, weight:{coinsCopy[r]}')


期望的执行结果为：

False coin idx:0, weight:99
False coin idx:1, weight:99
False coin idx:2, weight:99
False coin idx:3, weight:99
False coin idx:4, weight:99
False coin idx:5, weight:99
False coin idx:6, weight:99
False coin idx:7, weight:99
False coin idx:8, weight:99
False coin idx:9, weight:99
False coin idx:10, weight:99


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答案：
第1空：0, len(coins)

第2空：idxStart+n:idxStart+2*n

第3空：idxStart+2*n:idxStart+iLength

第4空：idxStart+n, n

第5空：idxStart+2*n, iLength-2*n

第6空：coinsCopy