#include<bits/stdc++.h>

using namespace std;
 
typedef long long int ll;
typedef long double ld;
#define f first
#define s second
#define pb push_back
#define pii pair<int, int>

 
const int N = 2e5 + 100;
const int inf = 1e9;
const ll mod =  998244353;




int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<int> a(n + 1);
    a[1] = 1;
    a[2] = 1;
    const int mod = 1000007;
    for (int i = 2; i <= n; i++) {
        a[i] = (a[i - 1] + a[i - 2]) % mod;
    }
    cout << a[n] << endl;

    return 0;
}