#define _CRT_SECURE_NO_WARNINGS
#include<sstream>
#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<climits>
#include<cmath>
#include<string>
#include<vector>
#include<set>
#include<map>
#include<queue>
#include<numeric>
#include<functional>
#include<algorithm>
#include<bitset>
#include<tuple>
#include<unordered_set>
#include<random>
using namespace std;
#define INF (1<<29)
#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define all(v) v.begin(),v.end()
#define uniq(v) v.erase(unique(all(v)),v.end())
#define indexOf(v,x) (find(all(v),x)-v.begin())


int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int p;
	cin>>p;
	long long ans=1,t=1;
	rep(i,p)ans*=10;
	rep(i,p)t*=9;
	ans-=t;
	long long dp[3]={};
	dp[0]=1;
	rep(i,p){
		long long nxt[3]={};
		rep(mod,3)rep(j,10)if(j!=3){
			nxt[(mod+j)%3] += dp[mod];
		}
		memcpy(dp,nxt,sizeof(dp));
	}
	ans += dp[0]-1;
	cout<<ans<<endl;

	return 0;
}