#include <iostream>
#include <vector>
#include <cmath>
#include <set>

using namespace std;

int main() {
    int n;
    long long pr = pow(10, 9) + 7;
    cin >> n;
    long long* brackets = new long long[n / 2];
    brackets[0] = 1;
    for (int i = 1; i <= n / 2; ++i)
    {
        brackets[i] = 0;
        for (int j = 0; j < i; ++j)
            brackets[i] += (brackets[j] % pr) * (brackets[i - 1 - j] % pr);
    }
    cout << brackets[n / 2] % pr;

    return 0;
}