結果
問題 | No.1302 Random Tree Score |
ユーザー | Kite_kuma |
提出日時 | 2020-11-09 12:22:21 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 753 ms / 3,000 ms |
コード長 | 4,102 bytes |
コンパイル時間 | 1,703 ms |
コンパイル使用メモリ | 176,092 KB |
実行使用メモリ | 9,304 KB |
最終ジャッジ日時 | 2024-07-22 16:00:26 |
合計ジャッジ時間 | 8,212 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 141 ms
5,376 KB |
testcase_03 | AC | 330 ms
6,436 KB |
testcase_04 | AC | 132 ms
5,376 KB |
testcase_05 | AC | 753 ms
9,276 KB |
testcase_06 | AC | 596 ms
9,276 KB |
testcase_07 | AC | 118 ms
5,376 KB |
testcase_08 | AC | 343 ms
6,472 KB |
testcase_09 | AC | 560 ms
9,296 KB |
testcase_10 | AC | 630 ms
9,304 KB |
testcase_11 | AC | 114 ms
5,376 KB |
testcase_12 | AC | 669 ms
9,120 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 548 ms
9,292 KB |
testcase_15 | AC | 642 ms
9,296 KB |
testcase_16 | AC | 2 ms
5,376 KB |
ソースコード
/* author: Kite_kuma created: 2020.11.09 12:08:40 */ // #ifdef LOCAL // #define _GLIBCXX_DEBUG // #endif #include <bits/stdc++.h> using namespace std; const int mod = 998244353; const int root = 3; unsigned int add(const unsigned int x, const unsigned int y) { return (x + y < mod) ? x + y : x + y - mod; } unsigned int sub(const unsigned int x, const unsigned int y) { return (x >= y) ? (x - y) : (mod - y + x); } unsigned int mul(const unsigned int x, const unsigned int y) { return (unsigned long long)x * y % mod; } unsigned int mod_pow(unsigned int x, unsigned int n) { unsigned int res = 1; while(n > 0) { if(n & 1) { res = mul(res, x); } x = mul(x, x); n >>= 1; } return res; } unsigned int inverse(const unsigned int x) { return mod_pow(x, mod - 2); } void ntt(vector<int> &a, const bool rev = false) { unsigned int i, j, k, l, p, q, r, s; const unsigned int size = a.size(); if(size == 1) return; vector<int> b(size); r = rev ? (mod - 1 - (mod - 1) / size) : (mod - 1) / size; s = mod_pow(root, r); vector<unsigned int> kp(size / 2 + 1, 1); for(i = 0; i < size / 2; ++i) kp[i + 1] = mul(kp[i], s); for(i = 1, l = size / 2; i < size; i <<= 1, l >>= 1) { for(j = 0, r = 0; j < l; ++j, r += i) { for(k = 0, s = kp[i * j]; k < i; ++k) { p = a[k + r], q = a[k + r + size / 2]; b[k + 2 * r] = add(p, q); b[k + 2 * r + i] = mul(sub(p, q), s); } } swap(a, b); } if(rev) { s = inverse(size); for(i = 0; i < size; i++) { a[i] = mul(a[i], s); } } } vector<int> convolute(const vector<int> &a, const vector<int> &b) { const int size = (int)a.size() + (int)b.size() - 1; int t = 1; while(t < size) { t <<= 1; } vector<int> A(t, 0), B(t, 0); for(int i = 0; i < (int)a.size(); i++) { A[i] = a[i]; } for(int i = 0; i < (int)b.size(); i++) { B[i] = b[i]; } ntt(A), ntt(B); for(int i = 0; i < t; i++) { A[i] = mul(A[i], B[i]); } ntt(A, true); A.resize(size); return A; } #pragma region modint template <int mod> struct ModInt { int x; ModInt() : x(0) {} ModInt(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {} ModInt &operator+=(const ModInt &p) { if((x += p.x) >= mod) x -= mod; return *this; } ModInt &operator-=(const ModInt &p) { if((x += mod - p.x) >= mod) x -= mod; return *this; } ModInt &operator*=(const ModInt &p) { x = (int)(1LL * x * p.x % mod); return *this; } ModInt &operator/=(const ModInt &p) { *this *= p.inverse(); return *this; } ModInt operator-() const { return ModInt(-x); } ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; } ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; } ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; } ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; } bool operator==(const ModInt &p) const { return x == p.x; } bool operator!=(const ModInt &p) const { return x != p.x; } ModInt inverse() const { int a = x, b = mod, u = 1, v = 0, t; while(b > 0) { t = a / b; swap(a -= t * b, b); swap(u -= t * v, v); } return ModInt(u); } ModInt pow(long long n) const { ModInt ret(1), mul(x); while(n > 0) { if(n & 1) ret *= mul; mul *= mul; n >>= 1; } return ret; } friend ostream &operator<<(ostream &os, const ModInt &p) { return os << p.x; } friend istream &operator>>(istream &is, ModInt &a) { long long t; is >> t; a = ModInt<mod>(t); return (is); } static int get_mod() { return mod; } }; using mint = ModInt<mod>; #pragma endregion int main() { int n; cin >> n; vector<mint> fac(n + 2); fac[0] = 1; for(int i = 0; i < n + 1; i++) { fac[i + 1] = fac[i] * (i + 1); } vector<int> fx(n - 1); for(int i = 0; i < n - 1; i++) { fx[i] = ((mint)(i + 1) / fac[i]).x; } int k = n; vector<int> res = {1}; while(k) { if(k & 1) { res = convolute(res, fx); if(res.size() >= n) res.resize(n - 1); } fx = convolute(fx, fx); if(fx.size() >= n) fx.resize(n - 1); k >>= 1; } res.resize(n - 1); cout << fac[n - 2] * res[n - 2] / mod_pow(n, n - 2) << endl; return 0; }