汽水瓶---python实现多行输入

def changeWater(cout_0):
    # 喝水的瓶数
    cout_1=0
    if cout_0<2:
        return 0
    while cout_0>2:
        cout_1+=cout_0//3
        cout_0=cout_0//3+cout_0%3
    if cout_0==2:
        cout_1+=1
    return cout_1
# 空盖子个数
lines=[]
while True:
    try:
        # PYTHON多行输入以空格“ ”结束
        lines.append(int(input()))
    except:
        result=[]
        for i in lines:
            result.append(changeWater(i))
        for i in result:
            print(i)
        break