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#include <iostream>

using namespace std;
typedef unsigned long long ull;

const ull limit = 1458;

ull Square(ull number)
{
    return number * number;
}

ull SumOfSquares(ull number)
{
    ull sumForSquares = 0;
    while (number > 0)
    {
        sumForSquares += Square(number % 10);
        number /= 10;
    }

    return sumForSquares;
}

int main()
{
    ull k, a, b;
    ull count = 0;

    cin >> k >> a >> b;

    for (ull i = 1; i <= limit; i++)
    {
        ull current = i * k;
        if (current < a)
        {
            continue;
        }
        if (current > b)
        {
            break;
        }

        ull sumOfSquares = SumOfSquares(current);
        if (sumOfSquares * k == current)
        {
            count++;
        }
    }

    cout << count << endl;
    return 0;
}