結果
問題 | No.1001 注文の多い順列 |
ユーザー | kroton |
提出日時 | 2020-03-02 17:00:24 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 97 ms / 2,000 ms |
コード長 | 3,905 bytes |
コンパイル時間 | 1,089 ms |
コンパイル使用メモリ | 106,308 KB |
実行使用メモリ | 73,728 KB |
最終ジャッジ日時 | 2024-10-13 21:14:34 |
合計ジャッジ時間 | 2,991 ms |
ジャッジサーバーID (参考情報) |
judge3 / 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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 2 ms
5,248 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 2 ms
5,248 KB |
testcase_17 | AC | 2 ms
5,248 KB |
testcase_18 | AC | 58 ms
61,440 KB |
testcase_19 | AC | 53 ms
55,552 KB |
testcase_20 | AC | 35 ms
37,120 KB |
testcase_21 | AC | 32 ms
33,536 KB |
testcase_22 | AC | 70 ms
73,728 KB |
testcase_23 | AC | 69 ms
73,344 KB |
testcase_24 | AC | 63 ms
73,088 KB |
testcase_25 | AC | 68 ms
71,552 KB |
testcase_26 | AC | 75 ms
70,656 KB |
testcase_27 | AC | 75 ms
71,936 KB |
testcase_28 | AC | 75 ms
72,064 KB |
testcase_29 | AC | 59 ms
72,704 KB |
testcase_30 | AC | 56 ms
69,632 KB |
testcase_31 | AC | 59 ms
72,832 KB |
testcase_32 | AC | 55 ms
73,728 KB |
testcase_33 | AC | 97 ms
73,728 KB |
ソースコード
#include <algorithm> #include <bitset> #include <cassert> #include <cctype> #include <cmath> #include <cstdint> #include <cstdio> #include <cstring> #include <deque> #include <fstream> #include <functional> #include <iostream> #include <limits> #include <map> #include <numeric> #include <queue> #include <set> #include <vector> using namespace std; using ll = long long; #define fst first #define snd second /* clang-format off */ template <class T, size_t D> struct _vec { using type = vector<typename _vec<T, D - 1>::type>; }; template <class T> struct _vec<T, 0> { using type = T; }; template <class T, size_t D> using vec = typename _vec<T, D>::type; template <class T> vector<T> make_v(size_t size, const T& init) { return vector<T>(size, init); } template <class... Ts> auto make_v(size_t size, Ts... rest) { return vector<decltype(make_v(rest...))>(size, make_v(rest...)); } template <class T> inline void chmin(T &a, const T& b) { if (b < a) a = b; } template <class T> inline void chmax(T &a, const T& b) { if (b > a) a = b; } /* clang-format on */ template <std::uint_fast64_t Modulus> class modint { using u64 = std::uint_fast64_t; public: u64 a; constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) { } constexpr u64 &value() noexcept { return a; } constexpr const u64 &value() const noexcept { return a; } constexpr modint operator+(const modint rhs) const noexcept { return modint(*this) += rhs; } constexpr modint operator-(const modint rhs) const noexcept { return modint(*this) -= rhs; } constexpr modint operator*(const modint rhs) const noexcept { return modint(*this) *= rhs; } constexpr modint operator/(const modint rhs) const noexcept { return modint(*this) /= rhs; } constexpr modint &operator+=(const modint rhs) noexcept { a += rhs.a; if (a >= Modulus) { a -= Modulus; } return *this; } constexpr modint &operator-=(const modint rhs) noexcept { if (a < rhs.a) { a += Modulus; } a -= rhs.a; return *this; } constexpr modint &operator*=(const modint rhs) noexcept { a = a * rhs.a % Modulus; return *this; } constexpr modint &operator/=(const modint rhs) noexcept { return *this *= ~rhs; } constexpr modint power(u64 exp) const noexcept { modint v = 1, x = *this; while (exp) { if (exp & 1) { v *= x; } x *= x; exp >>= 1; } return v; } constexpr modint operator~() const noexcept { return power(Modulus - 2); } }; using mint = modint<1000000007>; vector<mint> fact, factInv; void initFact(int N) { fact.resize(N + 1); factInv.resize(N + 1); fact[0] = 1; for (int i = 1; i <= N; i++) fact[i] = fact[i - 1] * i; factInv[N] = ~fact[N]; for (int i = N - 1; i >= 0; i--) factInv[i] = factInv[i + 1] * (i + 1); } int main() { #ifdef DEBUG ifstream ifs("in.txt"); cin.rdbuf(ifs.rdbuf()); #endif int N; while (cin >> N) { using pii = pair<int, int>; vector<pii> X(N); for (auto& x : X) { cin >> x.snd >> x.fst; if (x.snd == 1) { --x.fst; } } sort(X.begin(), X.end()); vec<mint, 2> dp = make_v(N + 1, N + 1, mint(0)); dp[0][0] = 1; int gre = 0; for (int i = 0; i < N; i++) { for (int j = 0; j <= gre; j++) { int used = j + (i - gre); int rem = max(0, X[i].fst - used); if (X[i].snd == 0) { dp[i + 1][j] += dp[i][j] * rem; } else { dp[i + 1][j + 1] += dp[i][j] * rem; dp[i + 1][j] += dp[i][j]; } } if (X[i].snd == 1) { ++gre; } } mint res = 0; initFact(N + 10); for (int i = 0; i <= gre; i++) { mint way = dp[N][i] * fact[gre - i]; if (i % 2 == 0) { res += way; } else { res -= way; } } cout << res.value() << endl; } return 0; }