#include <iostream>
using namespace std;
using ull = unsigned long long;

int main()
{
    int P;
    cin >> P;
    P--;
    ull ans1 = 10;
    ull ans2 = 6;
    for (int i = 0; i < P; i++) {
        ans1 *= 10;
        ans2 *= 9;
    }
    cout << ans1 - ans2 - 1 << endl;
    return 0;
}