#include <bits/stdc++.h>
#define EPS 1e-9
#define INF 1070000000LL
#define MOD 1000000007LL
#define fir first
#define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++)
#define numa(x,a) for(auto x: a)
#define ite iterator
#define mp make_pair
#define rep(i,n) rep2(i,0,n)
#define rep2(i,m,n) for(int i=m;i<(n);i++)
#define pb push_back
#define pf push_front
#define sec second
#define sz(x) ((int)(x).size())
#define ALL( c ) (c).begin(), (c).end()
#define gcd(a,b) __gcd(a,b)
#define mem(x,n) memset(x,n,sizeof(x))
#define endl "\n"
using namespace std;
template <int POS, class TUPLE> void deploy(std::ostream &os, const TUPLE &tuple){}
template <int POS, class TUPLE, class H, class ...Ts> void deploy(std::ostream &os, const TUPLE &t){ os << (POS == 0 ? "" : ", ") << get<POS>(t); deploy<POS + 1, TUPLE, Ts...>(os, t); }
template <class T,class U> std::ostream& operator<<(std::ostream &os, std::pair<T,U> &p){ os << "(" << p.first <<", " << p.second <<")";return os; }
template <class T> std::ostream& operator<<(std::ostream &os, std::vector<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; }
template <class T> std::ostream& operator<<(std::ostream &os, std::set<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; }
template <class T, class K> std::ostream& operator<<(std::ostream &os, std::map<T, K> &mp){ int remain = mp.size(); os << "{"; for(auto e: mp) os << "(" << e.first << " -> " << e.second << ")" << (--remain == 0 ? "}" : ", "); return os; }
#define DEBUG1(var0) { std::cerr << (#var0) << "=" << (var0) << endl; }
#define DEBUG2(var0, var1) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG1(var1); }
#define DEBUG3(var0, var1, var2) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG2(var1,var2); }
#define DEBUG4(var0, var1, var2, var3) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG3(var1,var2,var3); }
using ll = long long;
int P;
ll  memo[40][2][4][3];//(has3, mod3,has3 and mod3)
void dp_go(int now, bool has3, int mod){
  if (now == P) {
    ll x = 0;
    ll y = 0;
    ll z = 0;
    if (has3) {
      x = 1;
    }
    if (mod == 0) {
      y = 1;
    }
    if (x == 1 && y == 1) {
      z = 1;
    }
    memo[now][has3][mod][0] = x;
    memo[now][has3][mod][1] = y;
    memo[now][has3][mod][2] = z;
    return;
  }
  if (memo[now][has3][mod][0] != -1){
    return;
  }
  ll ret[3] = {};
  rep(i,10){
    int nnow = now + 1;
    int nmod = (mod + i) % 3;
    bool nhas3 = has3;
    if (i == 3) {
      nhas3 = true;
    }
    dp_go(nnow, nhas3, nmod);
    rep(k,3){
      ret[k] += memo[nnow][nhas3][nmod][k];
      //DEBUG3(i,k,ret[k]);
    }
  }
  rep(k,3){
    memo[now][has3][mod][k] = ret[k];
  }
  return;
}



int main()
{
  cin.tie(0);
  ios_base::sync_with_stdio(0);
  cin >> P;
  rep(i,30){
    rep(j,2){
      rep(k,4){
        memo[i][j][k][0] = -1;
      }
    }
  }
  dp_go(0,false,0);
  auto z1 = memo[0][false][0][0];
  auto z2 = memo[0][false][0][1];
  auto z3 = memo[0][false][0][2];
  
  cout << z1 + z2 - z3 - 1 << endl;
  return 0;
}