def II(): return int(input())
def MI(): return map(int, input().split())
def TI(): return tuple(MI())
def LI(): return list(MI())
#str-input
def SI(): return input()
def MSI(): return input().split()
def SI_L(): return list(SI())
def SI_LI(): return list(map(int, SI()))
#multiple-input
def LLI(n): return [LI() for _ in range(n)]
def LSI(n): return [SI() for _ in range(n)]
#1-indexを0-indexでinput
def MI_1(): return map(lambda x:int(x)-1, input().split())
def TI_1(): return tuple(MI_1())
def LI_1(): return list(MI_1())

class fenwick_tree():
    n=1
    data=[0 for i in range(n)]
    def __init__(self,N):
        self.n=N
        self.data=[0 for i in range(N)]
    def add(self,p,x):
        assert 0<=p<self.n,"0<=p<n,p={0},n={1}".format(p,self.n)
        p+=1
        while(p<=self.n):
            self.data[p-1]+=x
            p+=p& -p
    def sum(self,l,r):
        assert (0<=l and l<=r and r<=self.n),"0<=l<=r<=n,l={0},r={1},n={2}".format(l,r,self.n)
        return self.sum0(r)-self.sum0(l)
    def sum0(self,r):
        s=0
        while(r>0):
            s+=self.data[r-1]
            r-=r&-r
        return s

mod = 998244353
class Comb: #combination列挙
    def __init__(self,lim,mod = mod):
        """
        mod : prime指定
        lim以下のmodでcomdination計算
        """
        self.fac = [1,1]
        self.inv = [1,1]
        self.finv = [1,1]
        self.mod = mod
        for i in range(2,lim+1):
            self.fac.append(self.fac[i-1]*i%self.mod)
            self.inv.append(-self.inv[mod%i]*(mod//i)%self.mod)
            self.finv.append(self.finv[i-1]*self.inv[i]%self.mod)

    def F(self,a):
        return self.fac[a]
    
    def C(self,a,b):
        #自然な拡張
        assert b >= 0, "第2引数の値が負です"
        if a < b: return 0
        if a < 0: return 0
        # 0 <= a ∧ b <= a (b < 0でバグる)
        return self.fac[a]*self.finv[b]*self.finv[a-b]%self.mod
    
    def P(self,a,b):
        assert b >= 0, "第2引数の値が負です"
        if a < b: return 0
        if a < 0: return 0
        return self.fac[a]*self.finv[a-b]%self.mod
    
    def H(self,a,b):
        return self.C(a+b-1,b)
    
    def Fi(self,a):
        return self.finv[a]

n = II()
comb = Comb(n+1)


#縦の長さ
ans = 0
for i in range(2,n-1):
    j = n-i #最長減少
    di = pow(i,-1,mod)
    dj = pow(j,-1,mod)
    dij = pow(i+j-1,-1,mod)
    ans += (comb.F(n)*comb.Fi(i-2)*comb.Fi(j-2)%mod*di*dj*dij%mod)**2

print(ans%mod)