#include <bits/stdc++.h>
using namespace std;

const int MAXN = 2e5 + 10, MOD = 1e9 + 7;
int n, fibo[MAXN];

int main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	
	cin >> n;
	fibo[1] = fibo[2] = 1;
	
	for (int i = 3; i <= n; i++){
		fibo[i] = fibo[i - 1] + fibo[i - 2];
		fibo[i] %= MOD;
	}
	
	cout << fibo[n];
	
	return 0;
}