题解 | 汽水瓶
import sys
#简单模拟 最多可以接一瓶空瓶 也就是手上现在在喝的这一瓶
for line in sys.stdin:
a = line.split()
n = int(a[0])
if n ==0 :
break
can = 0
while n>=2 :
n = n-3
can+=1
n+=1
print(can)
import sys
#简单模拟 最多可以接一瓶空瓶 也就是手上现在在喝的这一瓶
for line in sys.stdin:
a = line.split()
n = int(a[0])
if n ==0 :
break
can = 0
while n>=2 :
n = n-3
can+=1
n+=1
print(can)
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