#include <bits/stdc++.h>   using namespace std;   long long dp[2];   void solve() {     long long n;     cin >> n;     for (int i = 0; i < n; i++) {       dp[i % 2] = dp[i % 2] + dp[!(i % 2)] + 1;       if (dp[i % 2] > 1000000007) dp[i % 2] %= 1000000007;     }     cout << (dp[0] + dp[1] + 1000000007) % (1000000007);   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     ;     solve();   }   