結果
問題 | No.243 出席番号(2) |
ユーザー | はまやんはまやん |
提出日時 | 2019-01-19 18:09:49 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,198 bytes |
コンパイル時間 | 1,531 ms |
コンパイル使用メモリ | 173,020 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-07-18 05:13:01 |
合計ジャッジ時間 | 5,383 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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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 | 83 ms
6,816 KB |
testcase_01 | AC | 83 ms
6,944 KB |
testcase_02 | AC | 80 ms
6,940 KB |
testcase_03 | AC | 79 ms
6,940 KB |
testcase_04 | AC | 80 ms
6,944 KB |
testcase_05 | AC | 79 ms
6,944 KB |
testcase_06 | AC | 83 ms
6,940 KB |
testcase_07 | WA | - |
testcase_08 | AC | 79 ms
6,940 KB |
testcase_09 | AC | 79 ms
6,944 KB |
testcase_10 | AC | 81 ms
6,940 KB |
testcase_11 | AC | 82 ms
6,940 KB |
testcase_12 | WA | - |
testcase_13 | AC | 81 ms
6,940 KB |
testcase_14 | AC | 80 ms
6,940 KB |
testcase_15 | AC | 80 ms
6,940 KB |
testcase_16 | AC | 79 ms
6,940 KB |
testcase_17 | WA | - |
testcase_18 | AC | 83 ms
6,944 KB |
testcase_19 | AC | 81 ms
6,940 KB |
testcase_20 | AC | 80 ms
6,944 KB |
testcase_21 | AC | 81 ms
6,944 KB |
testcase_22 | WA | - |
testcase_23 | AC | 84 ms
6,944 KB |
testcase_24 | AC | 85 ms
6,944 KB |
testcase_25 | AC | 82 ms
6,940 KB |
testcase_26 | AC | 80 ms
6,948 KB |
testcase_27 | AC | 85 ms
6,940 KB |
testcase_28 | AC | 80 ms
6,944 KB |
testcase_29 | AC | 81 ms
6,944 KB |
testcase_30 | AC | 80 ms
6,940 KB |
testcase_31 | AC | 84 ms
6,940 KB |
testcase_32 | AC | 79 ms
6,940 KB |
ソースコード
#include<bits/stdc++.h> #define rep(i,a,b) for(int i=a;i<b;i++) #define rrep(i,a,b) for(int i=a;i>=b;i--) #define fore(i,a) for(auto &i:a) #define all(x) (x).begin(),(x).end() //#pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60; template<class T>bool chmax(T &a, const T &b) { if (a<b) { a = b; return 1; } return 0; } template<class T>bool chmin(T &a, const T &b) { if (b<a) { a = b; return 1; } return 0; } //--------------------------------------------------------------------------------------------------- template<int MOD> struct ModInt { static const int Mod = MOD; unsigned x; ModInt() : x(0) { } ModInt(signed sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } ModInt(signed long long sig) { x = sig < 0 ? sig % MOD + MOD : sig % MOD; } int get() const { return (int)x; } ModInt &operator+=(ModInt that) { if ((x += that.x) >= MOD) x -= MOD; return *this; } ModInt &operator-=(ModInt that) { if ((x += MOD - that.x) >= MOD) x -= MOD; return *this; } ModInt &operator*=(ModInt that) { x = (unsigned long long)x * that.x % MOD; return *this; } ModInt &operator/=(ModInt that) { return *this *= that.inverse(); } ModInt operator+(ModInt that) const { return ModInt(*this) += that; } ModInt operator-(ModInt that) const { return ModInt(*this) -= that; } ModInt operator*(ModInt that) const { return ModInt(*this) *= that; } ModInt operator/(ModInt that) const { return ModInt(*this) /= that; } ModInt inverse() const { long long a = x, b = MOD, u = 1, v = 0; while (b) { long long t = a / b; a -= t * b; std::swap(a, b); u -= t * v; std::swap(u, v); } return ModInt(u); } bool operator==(ModInt that) const { return x == that.x; } bool operator!=(ModInt that) const { return x != that.x; } ModInt operator-() const { ModInt t; t.x = x == 0 ? 0 : Mod - x; return t; } }; template<int MOD> ostream& operator<<(ostream& st, const ModInt<MOD> a) { st << a.get(); return st; }; template<int MOD> ModInt<MOD> operator^(ModInt<MOD> a, unsigned long long k) { ModInt<MOD> r = 1; while (k) { if (k & 1) r *= a; a *= a; k >>= 1; } return r; } template<typename T, int FAC_MAX> struct Comb { vector<T> fac, ifac; Comb(){fac.resize(FAC_MAX,1);ifac.resize(FAC_MAX,1);rep(i,1,FAC_MAX)fac[i]=fac[i-1]*i; ifac[FAC_MAX-1]=T(1)/fac[FAC_MAX-1];rrep(i,FAC_MAX-2,1)ifac[i]=ifac[i+1]*T(i+1);} T aPb(int a, int b) { if (b < 0 || a < b) return T(0); return fac[a] * ifac[a - b]; } T aCb(int a, int b) { if (b < 0 || a < b) return T(0); return fac[a] * ifac[a - b] * ifac[b]; } T nHk(int n, int k) { if (n == 0 && k == 0) return T(1); if (n <= 0 || k < 0) return 0; return aCb(n + k - 1, k); }}; // nHk = (n+k-1)Ck : n is separator typedef ModInt<1000000007> mint; /*--------------------------------------------------------------------------------------------------- ∧_∧ ∧_∧ (´<_` ) Welcome to My Coding Space! ( ´_ゝ`) / ⌒i / \ | | / / ̄ ̄ ̄ ̄/ | __(__ニつ/ _/ .| .|____ \/____/ (u ⊃ ---------------------------------------------------------------------------------------------------*/ int N, A[5010]; int cnt[5010]; mint dp[2][5010]; Comb<mint, 101010> com; //--------------------------------------------------------------------------------------------------- void _main() { cin >> N; rep(i, 0, N) { cin >> A[i]; cnt[A[i]]++; } dp[0][0] = 1; rep(ai, 0, 5000) { int cu = ai % 2; int to = 1 - cu; rep(ng, 0, 5001) dp[to][ng] = 0; rep(ng, 0, 5000) { dp[to][ng] += dp[cu][ng]; dp[to][ng + 1] += dp[cu][ng] * cnt[ai]; } } mint ans = 0; rep(ng, 0, N+1) { mint d = dp[0][ng] * com.fac[N - ng]; if (ng % 2 == 0) ans += d; else ans -= d; } cout << ans << endl; }