UVA 11461 - Square Numbers

#include <stdio.h>
#include <string.h>
int on[100499];
int main()
{
    int i, a, b, t;
    memset(on,0,sizeof(on));
    for(i=1;i<=317;i++)
        on[i*i] = 1;
    while(~scanf("%d%d", &a, &b)) 
    {
    t=0;
    if(a==0&&b==0)
    break;
    for(i=a;i<=b;i++)
        {
        if(on[i])
        t++;
        }
    printf("%d\n", t);
    }
    return 0;
}