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

int main()
{
    unsigned long long int k,a,b;
    unsigned long long int qua = 0;

    scanf("%llu %llu %llu", &k, &a, &b);
    //k = 51; a = 5000; b = 10000;
    //k = 1; a = 1; b = 1000000000000000000;
    //k = 1000000000000000000; a = 1; b = 1000000000000000000;
    //k = 51; a = 5000; b = 10000;

    unsigned long long int n, n_temp, sum, dig;

    if(k > 1)
    {
        a = a - (a % k) + k;
    }
    //for(n = (a-a%k+k); n <= b && n <= k * 81 * (log10(n) + 1); n+=k)
    for(n = a; n <= b && n <= k * 81 * (log10(n) + 1); n += k)
    {
        n_temp = n;
        sum = 0;

        while(n_temp && (k * sum <= n))
        //while(n_temp)
        {
            dig = n_temp % 10;
            sum += (dig * dig);
            n_temp /= 10;
        }

        //printf("%llu \t %llu\n", n, sum);

        if( n % sum == 0 )
        {
            //printf("%llu \t %llu \t %llu \n", n, sum, n/sum);
        }

        if( k * sum == n )
        {
            qua += 1;
            //printf("%llu \t %llu\n", n, sum);
        }
    }

    printf("%llu", qua);

    return 0;
}