#ifndef LOCAL
#include <atcoder/all>
#include <bits/stdc++.h>
#else
#include <local.h>
#endif
using namespace std;
using namespace atcoder;
using mint = modint998244353;
using mint1 = modint1000000007;
using std::cin;
using std::cout;
#define fi first
#define se second
#define endl '\n'
#define pb(a) push_back(a)
#define eb(a) emplace_back(a)
#define ppf() pop_front()
#define ppb() pop_back() z
#define pp() pop()
#define mp(f, s) make_pair(f, s)
#define A(a) begin(a), end(a)
#define vc vector
template <class f> using vv = vector<vector<f>>;
template <class f> using v3 = vector<vector<vector<f>>>;
#define pq priority_queue
template <class f> using pqg = priority_queue<f, vc<f>, greater<f>>;
using uint = uint32_t;
using ll = int64_t;
using ull = uint64_t;
using vi = vc<int>;
using vl = vc<ll>;
using vb = vc<bool>;
using pi = pair<int, int>;
using str = string;
using vs = vc<str>;
const str yes = "Yes\n", no = "No\n";
constexpr int dx[] = {-1, 0, 0, 1, -1, 1, -1, 1};
constexpr int dy[] = {0, -1, 1, 0, -1, -1, 1, 1};

int main() {
	cin.tie(0)->sync_with_stdio(0);
	ll n;cin>>n;
	if(n>=1e9+7)cout<<0<<endl;
	else{
		mint1 a=1;
		for(int i=1;i<=n;i++)
			a*=i;
		cout<<a.val()<<endl;
	}
}