#include using namespace std; typedef long long ll; typedef pair p_ll; template void debug(T itr1, T itr2) { auto now = itr1; while(now=0; i--) const ll MOD = 998244353; const ll LLINF = pow(2,61)-1; const int INF = pow(2,30)-1; vector fac; void c_fac(int x=pow(10,6)+10) { fac.resize(x,true); rep(i,x) fac[i] = i ? (fac[i-1]*i)%MOD : 1; } ll modpow(ll x, ll p) { ll result = 1, now = 1, pm = x; while (now<=p) { if (p&now) { result = result * pm % MOD; } now*=2; pm = pm*pm % MOD; } return result; } ll inv(ll a, ll m=MOD) { ll b = m, x = 1, y = 0; while (b!=0) { int d = a/b; a -= b*d; swap(a,b); x -= y*d; swap(x,y); } return (x+m)%m; } ll nck(ll n, ll k) { return fac[n]*inv(fac[k]*fac[n-k]%MOD)%MOD; } ll gcd(ll a, ll b) { if (a x1, x2, theta; FastNumberTheoreticTransform(ll N) { size_x12 = N*2-1; size = 1; while (size<=size_x12) size<<=1; root = modpow(3,MOD/size); x1.resize(size); x2.resize(size); theta.resize(size); rep(i,size) theta[i] = i==0 ? 1 : theta[i-1]*root % MOD; } void set(vector &v1, vector &v2) { x1 = v1; x2 = v2; } vector convolution(vector &x, bool rev, ll s, ll pos=0) { if (s==1) return {x[pos]}; vector ex = convolution(x,rev,s/2,pos), ox = convolution(x,rev,s/2,pos+size/s); vector result(s); rep(i,s) result[i] = (ex[i%(s/2)] + theta[size/s*i] * ox[i%(s/2)]) % MOD; if (rev && s==size) { reverse(result.begin()+1, result.end()); ll invs = inv(size); for (auto &x: result) x = x * invs % MOD; } return result; }; vector mul(vector &v1, vector &v2) { set(v1,v2); vector cx1 = convolution(x1, false, size), cx2 = convolution(x2, false, size); vector cx12(size); rep(i,size) cx12[i] = cx1[i] * cx2[i] % MOD; vector x12 = convolution(cx12, true, size); vector result(v1.size()); copy(x12.begin(), x12.begin()+v1.size(), result.begin()); return result; } }; // ---------------------------------------------------------------------- // ---------------------------------------------------------------------- int main() { ll N; cin >> N; c_fac(); vector kei(N); rep(i,N) kei[i] = (i+1)*inv(fac[i])%MOD; // debug(all(kei)); FastNumberTheoreticTransform fntt(N); vector result(N,0); result[0] = 1; ll np = 1; while (np<=N) { if (np&N) result = fntt.mul(result,kei); kei = fntt.mul(kei,kei); np<<=1; } ll ho = fac[N-2] * inv(modpow(N,N-2)) % MOD; rep(i,N) result[i] = result[i] * ho % MOD; // debug(all(result)); cout << result[N-2] << endl; return 0; }