poj 1426 Find The Multiple

#include<stdio.h>
__int64 a[1500000];
int main()
{
int n,t1,t2;
while(scanf("%d",&n),n)
{
t1=0;
t2=1;
a[0]=1;
while(1)
{
if(a[t1]%n==0)
{
printf("%I64d/n", a[t1]);
break;
}
else
{
a[t2++]=a[t1]*10;
a[t2++]=a[t1]*10+1;
t1++;
}
}
}
return 0;
}