#include <iostream>
using namespace std;

int main(){
	int p;
	cin >> p;
	int64_t dp[p + 1][2][3]{};
	dp[0][0][0] = 1;
	for(int i = 0; i < p; i++) for(int j = 0; j < 2; j++) for(int k = 0; k < 3; k++) for(int l = 0; l < 10; l++){
		dp[i + 1][j || l == 3][(k + l) % 3] += dp[i][j][k];
	}
	cout << dp[p][0][0] + dp[p][1][0] + dp[p][1][1] + dp[p][1][2] - 1 << endl;
}