結果
問題 | No.1302 Random Tree Score |
ユーザー | sak |
提出日時 | 2021-01-07 06:35:29 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,215 bytes |
コンパイル時間 | 2,346 ms |
コンパイル使用メモリ | 210,700 KB |
実行使用メモリ | 42,372 KB |
最終ジャッジ日時 | 2024-11-07 20:26:34 |
合計ジャッジ時間 | 13,714 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
(要ログイン)
テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 21 ms
24,576 KB |
testcase_01 | AC | 21 ms
19,200 KB |
testcase_02 | AC | 1,477 ms
23,900 KB |
testcase_03 | TLE | - |
testcase_04 | AC | 1,459 ms
23,900 KB |
testcase_05 | TLE | - |
testcase_06 | -- | - |
testcase_07 | -- | - |
testcase_08 | -- | - |
testcase_09 | -- | - |
testcase_10 | -- | - |
testcase_11 | -- | - |
testcase_12 | -- | - |
testcase_13 | -- | - |
testcase_14 | -- | - |
testcase_15 | -- | - |
testcase_16 | -- | - |
ソースコード
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<ll, ll> p_ll; template<class T> void debug(T itr1, T itr2) { auto now = itr1; while(now<itr2) { cout << *now << " "; now++; } cout << endl; } #define repr(i,from,to) for (ll i=(ll)from; i<(ll)to; i++) #define all(vec) vec.begin(), vec.end() #define rep(i,N) repr(i,0,N) #define per(i,N) for (int i=(int)N-1; i>=0; i--) const ll MOD = 998244353; const ll LLINF = pow(2,61)-1; const int INF = pow(2,30)-1; vector<ll> 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<b) swap(a,b); return b==0 ? a : gcd(b, a%b); } ll lcm(ll a, ll b) { return a/gcd(a,b)*b; } // ---------------------------------------------------------------------- // ---------------------------------------------------------------------- struct FastNumberTheoreticTransform { ll size, size_v12, root, vsize, base;; vector<ll> theta; FastNumberTheoreticTransform(ll N=20) { size = 1<<N; root = modpow(3,MOD/size); theta.resize(size); rep(i,size) theta[i] = i==0 ? 1 : theta[i-1]*root % MOD; } void set(vector<ll> &v1, vector<ll> &v2) { size_v12 = v1.size() + v2.size() - 1; vsize = 0; while ((1<<vsize)<size_v12) vsize++; base = size>>vsize; } vector<ll> convolution(vector<ll> &x, bool rev, ll depth=0, ll pos=0) { if (depth==vsize) return {pos<x.size()?x[pos]:0}; vector<ll> ex = convolution(x,rev,depth+1,pos); vector<ll> ox = convolution(x,rev,depth+1,pos+(1<<depth)); ll N = 1<<(vsize-depth); vector<ll> result(N); rep(i,N) result[i] = (ex[i%(N/2)] + theta[base*(1<<depth)*i] * ox[i%(N/2)]) % MOD; if (rev && depth==0) { reverse(result.begin()+1, result.end()); ll invs = inv(1<<vsize); for (auto &x: result) x = x * invs % MOD; } return result; }; vector<ll> mul(ll N, vector<ll> &v1, vector<ll> &v2) { set(v1, v2); vector<ll> cv1 = convolution(v1, false), cv2 = convolution(v2, false); vector<ll> cv12(1<<vsize); rep(i,1<<vsize) cv12[i] = cv1[i] * cv2[i] % MOD; vector<ll> v12 = convolution(cv12, true); v12.resize(N); return v12; } }; // ---------------------------------------------------------------------- // ---------------------------------------------------------------------- int main() { ll N; cin >> N; c_fac(); vector<ll> kei(N); rep(i,N) kei[i] = (i+1)*inv(fac[i])%MOD; // debug(all(kei)); FastNumberTheoreticTransform fntt; vector<ll> result(N,0); result[0] = 1; ll np = 1; while (np<=N) { if (np&N) result = fntt.mul(N,result,kei); kei = fntt.mul(N,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; }