>>91
なるべく簡単に
#include <stdio.h>
int main()
{
int num;
scanf("%d",&num);
for (; num >1;) {
printf("%d ",num);
if (!(num % 2)){
num /= 2;
}else{
num *= 3; num++;
}
}
printf("%d\n",num);
return 0;
}