OJ Board

why i am getting WA???
#include<stdio.h>

int main()
{
unsigned long a,b,c,i,d,j,f,a1,b1,m,n;
while( scanf("%ld %ld", &a, &b)==2)
{
if(a==0 &&b==0)
{
break;
}
else
{
if(a>b)
{
a1=b;
b1=a;
}
else
{
a1=a;
b1=b;
}
f=0;
for(j=a1; j<=b1; j++)
{
i=j;
c=0;
while(1)
{
c++;
d ...