#include<iostream>
#include<vector>
#include<set>
#include<map>
#include<list>
#include<stack>
#include<queue>
#include<bitset>
#include<array>
#include<algorithm>
#include<cstdio>
#include<string>
#include<cstdlib>
#include<numeric>
#define D long long
#define U unsigned
using namespace std;
D n, m, a, b, d, e;
char c;
bool g, h;
string s;
D ans;
int main() {
	D i, j, k;
	U D t, u;
	cin >> a;
	t = 1;
	for (i = 0; i < a; i++) {
		t *= 10;
	}
	u = 6;
	for (i = 0; i < a - 1; i++) {
		u *= 9;
	}

	cout <<t-u-1<< endl;
}