#include <bits/stdc++.h>
using namespace std;
using lint = long long int;
template<class T = int> using V = vector<T>;
template<class T = int> using VV = V< V<T> >;
template<class T> void assign(V<T>& v, int n, const T& a = T()) { v.assign(n, a); }
template<class T, class... U> void assign(V<T>& v, int n, const U&... u) { v.resize(n); for (auto&& i : v) assign(i, u...); }

int main() {
  cin.tie(NULL); ios::sync_with_stdio(false);
  int p; cin >> p;
  string x(p + 1, '0');
  x[0] = '1';
  int n = x.size();
  VV<VV<lint>> dp; assign(dp, n + 1, 2, 3, 2);
  dp[0][1][0][0] = 1;
  for (int i = 0; i < n; i++) for (int r = 0; r < 3; r++) for (int d = 0; d < 10; d++) {
    dp[i + 1][0][(r + d) % 3][d == 3] += dp[i][0][r][0];
    dp[i + 1][0][(r + d) % 3][1] += dp[i][0][r][1];
    if (d > x[i] - '0') continue;
    dp[i + 1][d == x[i] - '0'][(r + d) % 3][d == 3] += dp[i][1][r][0];
    dp[i + 1][d == x[i] - '0'][(r + d) % 3][1] += dp[i][1][r][1];
  }
  lint res = 0;
  for (int f = 0; f < 2; f++) for (int r = 0; r < 3; r++) for (int g = 0; g < 2; g++) if (!r or g) res += dp[n][f][r][g];
  cout << res - 1 << '\n';
}