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//Marek Kochanowski
#include <iostream>
#include <cmath>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef short int si;

int main() {
    cout.sync_with_stdio(0);
    ios_base::sync_with_stdio(0);

    ll K, A, B;

    //cout << " IN: " << endl;
    cin >> K >> A >> B;
    //cout << " OUT: " << endl;
    ll D1 = A/K, D2 = B/K;
    //cout << "1:[" << D1 << " " << D2 << "]" << endl;
    if(D1>D2)
        swap(D1, D2);

    //cout << "2:[" << D1 << " " << D2 << "]" << endl;
    ll cnt = 0;
    for(ll i = D1; i < D2; i++) {
        ll left = i*K;
        if(left < A || left > B)
            continue;
        //cout << left;
        string leftString = to_string(left);
        //cout << " : ";
        ll tmp = 0;
        for(ll j = 0; j < leftString.length(); j++) {
            int tmp2 = (int)leftString[j]-48;
            //cout << tmp2 << " ";
            tmp += tmp2*tmp2;
        }

        //cout << "[" << i << " = " << tmp << "]";
        if(i == tmp) {
            //cout << " !! ";
            cnt++;
        }

        //cout << endl;
    }
    cout << cnt;
    return 0;
}