#include <bits/stdc++.h>
using namespace std;

bool check(int i) {
while (i) {
if (i % 10 <= 2 || i % 10 == 9)
return true;
i = i / 10;
}
return false;
}

int main() {
long long l, n, ans;
ans = 0;
cin >> n;
for (l = 1; l <= n; l++) {
if (check(l))
ans = ans + l;
}
cout << ans;
return 0;
}