#include <iostream>

using namespace std;

const long long int pr = pow(10, 9) + 7;

unsigned long int catalanDP(unsigned int n)
{
    unsigned long int* catalan = new unsigned long int[n + 1];


    catalan[0] = catalan[1] = 1;


    for (int i = 2; i <= n; i++)
    {
        catalan[i] = 0;
        for (int j = 0; j < i; j++)
        {
            catalan[i] += ((catalan[j] % pr) * (catalan[i - j - 1] % pr)) % pr;
            catalan[i] %= pr;
        }
    }
    unsigned long int res = catalan[n] % pr;
    delete[] catalan;

    return res;
}

int main()
{
    long int n;
    cin >> n;
    n /= 2;
    cout << catalanDP(n) << endl;
    return 0;
}