HEU 6000 The 3n + 1 problem

 

 1/**//**************************************
 2Problem: HEU 6000 The 3n + 1 problem
 3Time: 0.0120 s
 4Memory: 236 k 
 5Accepted Time: 2009-04-02 13:54:11
 6Tips: 第一个数有可能比第二个大。 
 7**************************************/
 8#include <stdio.h>
 9int main()
{
    long a,b;
    while(scanf("%ld%ld",&a,&b)!=EOF)
    {
        long i,j,max=0;
        long aa=a<b?a:b;
        long bb=a>b?a:b;
        for(i=aa;i<=bb;i++)
        {
            long sum=1,temp=i;
            while(temp!=1)
            {
                if(temp%2==1)temp=3*temp+1;
                else temp/=2;
                sum++;
            }
            if(sum>max)max=sum;
        }
        printf("%ld %ld %ld\n",a,b,max);
    }
    return 0;
}