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// Artur Kraska, II UWr

#include <algorithm>
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <vector>
#include <cmath>
#include <list>
#include <set>
#include <map>

#define forr(i, n)                  for(int i=0; i<n; i++)
#define FOREACH(iter, coll)         for(typeof(coll.begin()) iter = coll.begin(); iter != coll.end(); ++iter)
#define FOREACHR(iter, coll)        for(typeof(coll.rbegin()) iter = coll.rbegin(); iter != coll.rend(); ++iter)
#define lbound(P,R,PRED)            ({typeof(P) X=P,RRR=(R), PPP = P; while(PPP<RRR) {X = (PPP+(RRR-PPP)/2); if(PRED) RRR = X; else PPP = X+1;} PPP;})
#define testy()                     int _tests; scanf("%d", &_tests); FOR(_test, 1, _tests)
#define CLEAR(tab)                  memset(tab, 0, sizeof(tab))
#define CONTAIN(el, coll)           (coll.find(el) != coll.end())
#define FOR(i, a, b)                for(int i=a; i<=b; i++)
#define FORD(i, a, b)               for(int i=a; i>=b; i--)
#define MP                          make_pair
#define PB                          push_back
#define deb(X)                      X;

#define M 1000000007
#define INF 1000000007

using namespace std;

long long a, b, k;

long long podlicz(long long liczba)
{
    long long res = 0;
    while(liczba > 0)
    {
        long long x = liczba % 10;
        liczba /= 10;
        res += x*x;
    }
    return res;
}

int main()
{
    //scanf("%I64d %I64d %I64d", &k, &a, &b);
    cin >> k >> a >> b;

    long long res = 0;
    long long minn = (a+k-1)/k, maks = min(b/k, 2000ll);
    FOR(suma, minn, maks)
    {
        if(podlicz(suma*k) == suma)
            res++;
    }
    //printf("%I64d\n", res);
    cout << res << endl;

    return 0;
}