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#include <stdio.h>
#include <stdlib.h>
int f(int n);
int main(int argc, char* argv[])
{
    if (argc < 4)
    {
        return 1;
    }
    int res = 0;
    int k = atoi(argv[1]);
    int a = atoi(argv[2]);
    int b = atoi(argv[3]);
    for (; a <= b; a++)
    {
        if (k*f(a) == a)
        {
            res = res + 1;
        }
    }
    printf("%d", res);
    return 0;
}


int f(int n)
{
    int r = 0;
    while (n > 0)
    {
        r = r + (n%10)*(n%10);
        n = n/10;    
    }
    return r;
}