1020个西瓜 一天卖一半加两个 几天卖完

#include<stdio.h>
int main(int argc,char*argv[])
{
int n=0,rem,day=0;
scanf("%d",&n);
while(rem!=0)
{

    rem=n/2-2;
    day=day+1;
    
}

printf("%d\n",day);
return 0;

}

判断条件是 rem>0