题解 | #汽水瓶#

#include<string.h>
 
int main()
{
    int i,x,a,value,b;
    while(1)
    {
        value=0;
    scanf("%d",&x);
    if(x==0)
       break;;
        while(x/3)
        {
         a=x%3;
         value+=x/3;
         x=a+x/3;
         if(x==3||x==2)
         {value++;break;}
          if(x==1)
          break;
        }
        printf("%d\n",value);
}
}