#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

#define RREP(i,s,e) for (i = s; i >= e; i--)
#define rrep(i,n) RREP(i,n,0)
#define REP(i,s,e) for (i = s; i < e; i++)
#define rep(i,n) REP(i,0,n)
#define INF 100000000

typedef long long ll;
typedef unsigned long long ull;

ull power(int x, int n) {
    return n == 0 ? 1 : x * power(x,n-1);
}

int main() {
    int i, j, p;
    ull have3;
    ull n;
    cin >> p;
    have3 = 1;
    rep (i,p)
        have3 *= 9;
    have3 = power(10,p) - have3;
    n = 3;
    rep (i,p-1)
        n *= 9;
    n--;
    cout << have3 + n << endl;
    return 0;
}