#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    int n;
    cin >> n;

    int p[14];
    p[0] = 1;

    for (int i = 1; i <= n; i++) {
        int t = 0;
        for (int j = 0; j < i; j++) {
            t += p[j] * p[i - 1 - j];
        }
        p[i] = t;
    }

    cout << p[n] << endl;

    return 0;
}