結果
問題 | No.1001 注文の多い順列 |
ユーザー | kcvlex |
提出日時 | 2020-02-28 23:13:39 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 126 ms / 2,000 ms |
コード長 | 5,802 bytes |
コンパイル時間 | 1,889 ms |
コンパイル使用メモリ | 174,252 KB |
実行使用メモリ | 50,944 KB |
最終ジャッジ日時 | 2024-10-13 19:05:22 |
合計ジャッジ時間 | 3,621 ms |
ジャッジサーバーID (参考情報) |
judge2 / 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 | 3 ms
5,248 KB |
testcase_02 | AC | 3 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 3 ms
5,248 KB |
testcase_05 | AC | 3 ms
5,248 KB |
testcase_06 | AC | 3 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 3 ms
5,248 KB |
testcase_09 | AC | 3 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 3 ms
5,248 KB |
testcase_12 | AC | 3 ms
5,248 KB |
testcase_13 | AC | 3 ms
5,248 KB |
testcase_14 | AC | 4 ms
5,248 KB |
testcase_15 | AC | 5 ms
5,248 KB |
testcase_16 | AC | 4 ms
5,248 KB |
testcase_17 | AC | 4 ms
5,248 KB |
testcase_18 | AC | 59 ms
28,800 KB |
testcase_19 | AC | 56 ms
27,520 KB |
testcase_20 | AC | 37 ms
19,968 KB |
testcase_21 | AC | 35 ms
19,072 KB |
testcase_22 | AC | 72 ms
33,536 KB |
testcase_23 | AC | 69 ms
32,896 KB |
testcase_24 | AC | 69 ms
32,640 KB |
testcase_25 | AC | 67 ms
32,000 KB |
testcase_26 | AC | 126 ms
49,024 KB |
testcase_27 | AC | 123 ms
47,616 KB |
testcase_28 | AC | 117 ms
45,824 KB |
testcase_29 | AC | 19 ms
16,896 KB |
testcase_30 | AC | 20 ms
17,040 KB |
testcase_31 | AC | 21 ms
17,536 KB |
testcase_32 | AC | 15 ms
15,616 KB |
testcase_33 | AC | 125 ms
50,944 KB |
ソースコード
// #define DEBUGGING #include <bits/stdc++.h> #define endl '\n' #define ALL(v) std::begin(v), std::end(v) #define ALLR(v) std::rbegin(v), std::rend(v) using ll = std::int64_t; using ull = std::uint64_t; using pll = std::pair<ll, ll>; using tll = std::tuple<ll, ll, ll>; template <typename T> using vec = std::vector<T>; template <typename T> using vvec = vec<vec<T>>; template <typename T> const T& var_min(const T &t) { return t; } template <typename T> const T& var_max(const T &t) { return t; } template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return std::min(t, var_min(tail...)); } template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return std::max(t, var_max(tail...)); } template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); } template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); } template <typename T> const T& clamp(const T &t, const T &low, const T &high) { return std::max(low, std::min(high, t)); } template <typename T> void chclamp(T &t, const T &low, const T &high) { return t = clamp(t, low, high); } namespace init__ { struct InitIO { InitIO() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << std::fixed << std::setprecision(30); } } init_io; } #define mv_rec make_v(init, tail...) template <typename T> T make_v(T init) { return init; } template <typename T, typename... Tail> auto make_v(T init, size_t s, Tail... tail) { return vec<decltype(mv_rec)>(s, mv_rec); } #undef mv_rec #ifdef DEBUGGING #else #define DEBUG(...) 0 #define DEBUG_SEPARATOR_LINE 0 #endif namespace math { template <typename T> constexpr T pow(const T &n, ll k) { T ret = n.mul_id_ele(); T cur = n; while (k) { if (k & 1) ret *= cur; cur *= cur; k /= 2; } return ret; } } namespace math { template <ll Mod> struct Modint { constexpr Modint(ll x) : x(x % Mod) { } constexpr Modint() : Modint(0) { } constexpr Modint<Mod> add_id_ele() const { return Modint<Mod>(0); } constexpr Modint<Mod> mul_id_ele() const { return Modint<Mod>(1); } constexpr ll& value() { return x; } constexpr ll value() const { return x; } constexpr Modint& operator +=(const Modint &oth) { x += oth.value(); if (Mod <= x) x -= Mod; return *this; } constexpr Modint& operator -=(const Modint &oth) { x += Mod - oth.value(); if (Mod <= x) x -= Mod; return *this; } constexpr Modint& operator *=(const Modint &oth) { x *= oth.value(); x %= Mod; return *this; } constexpr Modint& operator /=(const Modint &oth) { x *= oth.inv(); x %= Mod; return *this; } constexpr Modint operator +(const Modint &oth) const { return Modint(x) += oth; } constexpr Modint operator -(const Modint &oth) const { return Modint(x) -= oth; } constexpr Modint operator *(const Modint &oth) const { return Modint(x) *= oth; } constexpr Modint operator /(const Modint &oth) const { return Modint(x) /= oth; } constexpr Modint operator -() const { return Modint((x != 0) * (Mod - x)); } template <typename T> constexpr typename std::enable_if<std::is_integral<T>::value, const Modint&>::type operator =(T t) { (*this) = Modint(std::forward<T>(t)); return *this; } constexpr Modint inv() const { return ::math::pow(*this, Mod - 2); } constexpr ll mod() const { return Mod; } private: ll x; }; } namespace math { template <ll Mod> class Combination { using mint = Modint<Mod>; ssize_t maxv; vec<mint> factv, ifactv; public: Combination(ssize_t maxv) : maxv(maxv), factv(maxv + 1), ifactv(maxv + 1) { factv[0] = mint(1); for (ll i = 1; i <= maxv; i++) factv[i] = factv[i - 1] * i; ifactv.back() = factv.back().inv(); for (ll i = maxv - 1; 0 <= i; i--) ifactv[i] = ifactv[i + 1] * (i + 1); } mint fact(ll n) const { return factv[n]; } mint ifact(ll n) const { return ifactv[n]; } mint perm(ll n, ll k) const { return factv[n] * ifactv[n - k]; } mint comb(ll n, ll k) const { return perm(n, k) * ifactv[k]; } }; } constexpr ll mod = 1e9 + 7; using mint = math::Modint<mod>; using namespace std; const size_t SIZE = 3010; mint dp[2 * SIZE][2 * SIZE]; // not used down arrow int main() { math::Combination<mod> C(SIZE * 10); ll n; cin >> n; vec<pll> tx(n); for (auto &&e : tx) { ll t, x; cin >> t >> x; e = pll(t, x); } vec<pll> cnts(n + 1); for (ll i = 0; i < n; i++) { ll t, x; tie(t, x) = tx[i]; x--; (t == 0 ? cnts[x].first : cnts[x].second)++; } dp[0][0] = 1; ll up_sum = 0, down_sum = 0; for (ll i = 0; i < n; i++) { ll a, b; tie(a, b) = cnts[i]; DEBUG(a, b); for (ll j = 0; j <= down_sum; j++) { ll rest = (i + 1) - up_sum - (down_sum - j); DEBUG(rest); if (j + b && a <= rest - 1) { mint c(j + b); c *= C.perm(rest - 1, a); DEBUG(j + b, rest, C.comb(rest - 1, a)); dp[i + 1][j + b - 1] += dp[i][j] * c; } if (a <= rest) { dp[i + 1][j + b] += dp[i][j] * C.perm(rest, a); } } up_sum += a; down_sum += b; } cout << dp[n][0].value() << endl; return 0; }