OJ Board

why im getting WA again and again.??
#include<stdio.h>
int main()
{ unsigned long i,n1,n2,n,c=1,p=0,temp,a,b,x;
while(scanf("%lu%lu",&n1,&n2)==2)
{ a=n1;
b=n2;
if(n1==0&&n2==0)
break;
else{
if(n1>n2)
{temp=n1;
n1=n2;
n2=temp;
}
p=0;
for(i=n1;i<=n2;i++)
{ c=0;
n=i;
while(n!=1)
{ if(n%2 ...