#include<bits/stdc++.h>
#define rep(i,j,k) for(int i=j;i<=k;i++)
#define repp(i,j,k) for(int i=j;i>=k;i--)
#define pii pair<int,int>
#define mp make_pair
#define fir first
#define sec second
#define ls(x) (x<<1)
#define rs(x) ((x<<1)|1)
#define lowbit(i) (i&-i)
#define int long long
using namespace std;
typedef long long ll;
const int N=50005,M=2e6+5,mo=998244353,inf=(ll)1e18+7;
const double PI=acos(-1);
void read(int &a){
    int x=0,w=1;
    char ch=getchar();
    while(!isdigit(ch)){
        if(ch=='-')w=-1;
        ch=getchar();
    }
    while(isdigit(ch)){
        x=(x<<3)+(x<<1)+ch-'0';
        ch=getchar();
    }
    a=x*w;
}
int n,m;
int quick_power(int base,int x){
    int res=1;
    while(x){
        if(x&1)res*=base,res%=mo;
        base*=base,base%=mo;
        x>>=1;
    }
    return res;
}
signed main(){
    read(n);
    if(n&1){
        puts("0");
        return 0;
    }
    if(n==2){
        puts("1");
        return 0;
    }
    m=n>>1;
    int ans=quick_power(n,m-2);
    rep(i,m+1,n)
        ans*=i,ans%=mo;
    printf("%lld\n",ans);
}