【PAT_Basic日记】1001. 害死人不偿命的(3n+1)猜想

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int n;
    int count=0;
    scanf("%d",&n);
    if(n<=0 || n>1000)exit(0);
    else
    {
        while(n!=1)
        {
            if(n%2==0)
            {
                n=n/2;
                count++;
            }
            else
            {
                n=(3*n+1)/2;
                count++;
            }
        }
    }
    printf("%d\n",count);
    return 0;
}