题解 | #汽水瓶#
汽水瓶
https://www.nowcoder.com/practice/fe298c55694f4ed39e256170ff2c205f
import sys
def get_spe(n):
if( n == 1):
return 0
if(n == 2):
return 1
num = int(n/3)
return num + get_spe(num + n%3)
while True:
try:
s = int(input())
if s == 0:
break
print( int(get_spe(s)))
except:
break
