Remainder

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int counter=0,i;
    long int a,b;

    scanf("%ld %ld",&a,&b);
    if(a==b)
        printf("infinity");
    else if(a-b < b)
        printf("0");
    else
    {
        for(i=1; i<= sqrt(a-b) ; i++)
        {
            if((a-b)%i == 0)
            {
                if(i<=b && i<sqrt(a-b) && (a-b)/i >b)
                    counter++;
                else if(i<=b && i==sqrt(a-b) && (a-b)/i >b)
                    continue;
                else if(i<=b && (a-b)/i >b)
                    counter++;
                else if(i==sqrt(a-b) && (a-b)/i >b)
                    counter++;
                else if(i>b && (a-b)/i >b)
                    counter= counter + 2;
            }
        }
        printf("%d",counter);
    }
    return 0;
}