// UUID: ef37ebf4-5e29-43be-91be-298edd0c3493
#include <bits/stdc++.h>
 
using namespace std;
 
#define ll long long
#define fs first
#define sc second
#define pb push_back
#define pll pair<ll, ll>
#define vll vector<ll>
#define v2ll vector<vll>
#define pqll priority_queue<ll>

const ll mod = 1e9+7;
const ll inf = LONG_LONG_MAX;

ll n;

ll rec(ll k) {
    if (k == 1) return 2;
    if (k == 2) return 11;
    return (rec(k-1)*2 % 2023 + rec(k-2)*7 % 2023) % 2023; 
}

void solve()
{
    cin >> n;
    cout << rec(n);
}
 
signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    ll t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}