#include <iostream>
#include <algorithm>

using namespace std;
const int mod = 998244353;
typedef long long LL;
#define int long long


int qmi(int a, int k, int p)
{
    int res = 1;
    while (k)
    {
        if (k & 1) res = (LL)res * a % p;
        a = (LL)a * a % p;
        k >>= 1;
    }
    return res;
}


int C(int a, int b, int p)
{
    if (b > a) return 0;

    int res = 1;
    for (int i = 1, j = a; i <= b; i ++, j -- )
    {
        res = (LL)res * j % p;
        res = (LL)res * qmi(i, p - 2, p) % p;
    }
    return res;
}


int lucas(LL a, LL b, int p)
{
    if (a < p && b < p) return C(a, b, p);
    return (LL)C(a % p, b % p, p) * lucas(a / p, b / p, p) % p;
}


signed main()
{
    int n;
    cin >> n;
    vector<int> s(n+10);
    s[0]=1;
    for(int i=1;i<=n;i++) s[i]=s[i-1]*i%mod;
    int sum=0;
    for(int x=1;x<=n;x++){
        sum=(sum+lucas(n-x,x-1,mod)*s[n-x]%mod*s[x-1]%mod)%mod;
        //cout<<n-x<<' '<<x-1<<' '<<s[n-x]<<' '<<lucas(n-x,x-1,mod)<<endl;
    }
    cout<<(sum+mod)%mod<<endl;
}

answer.code: In function ‘int main()’:
answer.code:48:5: error: ‘vector’ was not declared in this scope
   48 |     vector<int> s(n+10);
      |     ^~~~~~
answer.code:3:1: note: ‘std::vector’ is defined in header ‘<vector>’; did you forget to ‘#include <vector>’?
    2 | #include <algorithm>
  +++ |+#include <vector>
    3 | 
answer.code:7:13: error: expected primary-expression before ‘long’
    7 | #define int long long
      |             ^~~~
answer.code:48:12: note: in expansion of macro ‘int’
   48 |     vector<int> s(n+10);
      |            ^~~
answer.code:49:5: error: ‘s’ was not declared in this scope
   49 |     s[0]=1;
      |     ^