#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)



int P;
typedef long long ll;
ll dp[20][3][2];
//-----------------------------------------------------------------------------------
int main() {
    cin >> P;
    dp[0][0][0] = 1;
    rep(i, 0, P) rep(j, 0, 3) rep(k, 0, 2) {
        rep(c, 0, 10) {
            dp[i + 1][(j * 10 + c) % 3][k | (c == 3)] += dp[i][j][k];
        }
    }

    ll ans = dp[P][0][0] + dp[P][0][1] + dp[P][1][1] + dp[P][2][1] - 1;
    cout << ans << endl;
}