UVa 100 - The 3n+1 problem

Problem link: https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=36

 /***********************************************************************\  
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 |*********  ********** *********** *** ********** * ********* *** ******|  
 |********  *********** *I******** **** ********** *** ***** ***** ******|  
 |********  *********** ********* ****** ********* ***** ** ****** ******|  
 |**********  ********* ******** ***A**** ******** ******* ******* ******|  
 |***********  ******** ******* ********** ******* *************** ******|  
 |**********  ********* ****** ************ ****** *************** ******|  
 |********  *********** ***** ************** ***** ********M****** ******|  
 |*****  ************** **** **************** **** *************** ******|  
 |***********************************************************************|  
 |**************BSMRSTU********************************CSE***************|  
 \***********************************************************************/  
 #include<stdio.h>  
 #include<string.h>  
 #include<math.h>  
 #include<conio.h>  
 #include<stdlib.h>  
 #define ll long long  
 #define B break  
 #define C continue  
 #define sf scanf  
 #define pf printf  
 #define byebye return 0  
 int main()  
 {  
   int a,b;  
   while(sf("%d%d",&a,&b)!=EOF)  
   {  
     pf("%d %d",a,b);  
     if(a>b){  
       int n=a;  
       a=b;  
       b=n;  
     }  
     int i,j,total=0;  
     for(i=a; i<=b; i++)  
     {  
       int count=1;  
       j=i;  
       while(j!=1)  
       {  
         if(j%2)  
         {  
           j=(3*j)+1;  
         }  
         else  
         {  
           j=j/2;  
         }  
         count++;  
       }  
       if(total<count)  
         total=count;  
     }  
     pf(" %d\n",total);  
   }  
   byebye;  
 } 

Pastebin Link : http://pastebin.com/9RZ9nNXm