题解 | 汽水瓶
汽水瓶
https://www.nowcoder.com/practice/fe298c55694f4ed39e256170ff2c205f
while 1:
n = int(input())
if n == 0:
break
cnt = 0
while n >= 3:
cnt += n//3
n = n%3+n//3
if n == 2:
cnt += 1
print(cnt)
