#include <bits/stdc++.h>

#define REP(i, x, n) for (int i = x; i < (int)(n); i++)
#define rep(i, n) REP (i, 0, n)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) (int)(x.size())
#define popcount(x) __builtin_popcount(x)
#define popcountll(x) __builtin_popcountll(x)
#define uniq(x) x.erase(unique(x.begin(), x.end()), x.end())
#define F first
#define S second
#define mp make_pair
#define eb emplace_back

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

const int INF = 1 << 30;

ull dp[20][2][2][3]; // dp[桁][未満][3がつく][mod 3]

int main() {
    int p;
    cin >> p;

    string s = to_string((ull)(powl(10, p)));
    int len = p + 1;
    dp[0][0][0][0] = 1;

    rep (i, len) rep (j, 2) {
        int d = j ? 9 : s[i] - '0';
        rep (k, 2) rep(l, 3) rep(m, d + 1) {
            dp[i + 1][j | (int)(m < d)][k | (int)(m == 3)][(l + m) % 3] += dp[i][j][k][l];
        }
    }

    ull ans = 0;
    rep (j, 2) rep (k, 2) rep(l, 3) {
        if (k == 1 || l == 0) {
            ans += dp[len][j][k][l];
        }
    }
    ans--; // 0は含めない

    cout << ans << endl;
}