题解 | #汽水瓶#
汽水瓶
https://www.nowcoder.com/practice/fe298c55694f4ed39e256170ff2c205f
import sys
# 应用递归的思路来编写
def f(n):
if n < 2:
return 0
if n >= 2:
return f(n - 2) + 1
if __name__ == "__main__":
for x in sys.stdin:
x = int(x.strip())
if x != 0:
print(f(x))
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