题解 | #数位之和#
魔法数字变换
http://www.nowcoder.com/practice/db41a6ce80a646aa9a5eb6252ac2df76
#include<stdio.h>
int main()
{
int n;
int a=0;
scanf("%d",&n);
while(n-1)
{
if(n%2==0)
{
n=n/2;
a++;
}
else
{
n=3*n+1;
a++;
}
}
printf("%d",a);
return 0;
}