#pragma GCC target("avx2") #pragma GCC optimize("03") #pragma GCC optimize("unroll-loops") #include using namespace std; typedef long double ld; typedef long long ll; typedef unsigned long long ull; #define endl "\n" #define FOR(i,a,b) for(int i=(a);i<=(b);i++) #define rep(i,n) for(int i=0;i<(n);i++) #define PII pair #define PLL pair #define ALL(x) (x).begin(), (x).end() constexpr int INF=1<<30; constexpr ll LINF=1LL<<60; constexpr ll mod=1e9+7; constexpr int NIL = -1; templateinline bool chmax(T &a, const T &b) { if (ainline bool chmin(T &a, const T &b) { if (binline int popcount(T a) {return __builtin_popcount(a);} templateinline T emod(T a, T p) { return (a%p + p) % p;} //------------------- int main() { cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(15); int n; cin >> n; ll resi = 2*n; ll ans = 1; for(ll i = 1; i<=n; i++) { ll tmp = (2*i) * (2*i-1) / 2; tmp %= mod; ans = (ans * tmp) %mod; } cout << ans << endl; return 0; }