結果
問題 | No.140 みんなで旅行 |
ユーザー | m_tsubasa |
提出日時 | 2020-08-06 23:46:02 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
MLE
|
実行時間 | - |
コード長 | 3,259 bytes |
コンパイル時間 | 2,302 ms |
コンパイル使用メモリ | 215,532 KB |
実行使用メモリ | 746,560 KB |
最終ジャッジ日時 | 2024-09-22 03:52:43 |
合計ジャッジ時間 | 9,919 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 | 86 ms
61,864 KB |
testcase_01 | AC | 86 ms
61,764 KB |
testcase_02 | AC | 98 ms
69,896 KB |
testcase_03 | AC | 85 ms
61,820 KB |
testcase_04 | AC | 86 ms
61,768 KB |
testcase_05 | AC | 87 ms
61,772 KB |
testcase_06 | AC | 86 ms
61,792 KB |
testcase_07 | AC | 85 ms
61,836 KB |
testcase_08 | AC | 86 ms
61,872 KB |
testcase_09 | AC | 85 ms
61,772 KB |
testcase_10 | AC | 86 ms
61,760 KB |
testcase_11 | MLE | - |
testcase_12 | AC | 92 ms
66,224 KB |
testcase_13 | AC | 87 ms
62,692 KB |
testcase_14 | MLE | - |
testcase_15 | MLE | - |
testcase_16 | AC | 312 ms
227,784 KB |
testcase_17 | AC | 164 ms
116,428 KB |
testcase_18 | MLE | - |
testcase_19 | MLE | - |
testcase_20 | AC | 140 ms
100,560 KB |
testcase_21 | AC | 87 ms
62,024 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; template <int mod = (int)(1e9 + 7)> struct ModInt { int x; ModInt() : x(0) {} ModInt(int64_t 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(int64_t n) const { ModInt res(1), mul(x); while (n) { if (n & 1) res *= mul; mul *= mul; n >>= 1; } return res; } friend ostream &operator<<(ostream &os, const ModInt &p) { return os << p.x; } friend istream &operator>>(istream &is, ModInt &a) { int64_t t; is >> t; a = ModInt<mod>(t); return (is); } static int get_mod() { return mod; } }; struct Combination { vector<ModInt<>> _fact, _rfact, _inv; Combination(long long nsize = 5000000) : _fact(nsize + 1), _rfact(nsize + 1), _inv(nsize + 1) { _fact[0] = _rfact[nsize] = _inv[0] = 1; for (int i = 1; i <= nsize; i++) _fact[i] = _fact[i - 1] * i; _rfact[nsize] /= _fact[nsize]; for (int i = nsize - 1; i >= 0; i--) _rfact[i] = _rfact[i + 1] * (i + 1); for (int i = 1; i <= nsize; i++) _inv[i] = _rfact[i] * _fact[i - 1]; } inline ModInt<> fact(int k) const { return _fact[k]; } inline ModInt<> rfact(int k) const { return _rfact[k]; } inline ModInt<> inv(int k) const { return _inv[k]; } ModInt<> P(int n, int r) const { if (r < 0 || n < r) return 0; return fact(n) * rfact(n - r); } ModInt<> C(int p, int q) const { if (q < 0 || p < q) return 0; return fact(p) * rfact(q) * rfact(p - q); } // n types,choose r ModInt<> H(int n, int r) const { if (n < 0 || r < 0) return (0); return r == 0 ? 1 : C(n + r - 1, r); } }; int n; vector<vector<vector<ModInt<>>>> dp; Combination com; ModInt<> solve(); int main() { cin >> n; cout << solve() << endl; return 0; } ModInt<> solve() { ModInt<> res; dp.assign(n + 1, vector(n + 1, vector<ModInt<>>(n + 1, 0))); for (int i = 1; i <= n; ++i) dp[0][i][0] = 1; for (int i = 1; i <= n; ++i) for (int j = 1; j <= n; ++j) for (int k = 0; k <= min(i, j); ++k) { dp[i][j][k] = dp[i - 1][j][k] * (com.P(j, 2) + k); if (k) dp[i][j][k] += dp[i - 1][j][k - 1]; } for (int i = 0; i <= n; ++i) res += dp[n][i][i]; return res; }