結果
問題 | No.802 だいたい等差数列 |
ユーザー | noshi91 |
提出日時 | 2019-03-17 22:33:13 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 149 ms / 2,000 ms |
コード長 | 6,381 bytes |
コンパイル時間 | 664 ms |
コンパイル使用メモリ | 73,908 KB |
実行使用メモリ | 8,320 KB |
最終ジャッジ日時 | 2024-07-08 00:37:01 |
合計ジャッジ時間 | 2,105 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 1 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 7 ms
7,152 KB |
testcase_11 | AC | 9 ms
8,320 KB |
testcase_12 | AC | 4 ms
5,632 KB |
testcase_13 | AC | 8 ms
8,064 KB |
testcase_14 | AC | 23 ms
6,912 KB |
testcase_15 | AC | 53 ms
5,376 KB |
testcase_16 | AC | 12 ms
6,912 KB |
testcase_17 | AC | 2 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 21 ms
5,888 KB |
testcase_20 | AC | 145 ms
7,104 KB |
testcase_21 | AC | 149 ms
8,320 KB |
testcase_22 | AC | 8 ms
8,320 KB |
testcase_23 | AC | 50 ms
5,376 KB |
testcase_24 | AC | 2 ms
5,376 KB |
testcase_25 | AC | 1 ms
5,376 KB |
testcase_26 | AC | 4 ms
5,376 KB |
testcase_27 | AC | 3 ms
5,376 KB |
testcase_28 | AC | 50 ms
5,504 KB |
testcase_29 | AC | 145 ms
8,320 KB |
testcase_30 | AC | 2 ms
5,376 KB |
testcase_31 | AC | 1 ms
5,376 KB |
testcase_32 | AC | 2 ms
5,376 KB |
testcase_33 | AC | 5 ms
5,376 KB |
ソースコード
//#define NDEBUG #include <cstddef> #include <cstdint> #include <vector> namespace n91 { using i8 = std::int_least8_t; using i32 = std::int_least32_t; using i64 = std::int_least64_t; using u8 = std::uint_least8_t; using u32 = std::uint_least32_t; using u64 = std::uint_least64_t; using isize = std::ptrdiff_t; using usize = std::size_t; class rep { const usize f, l; public: class itr { friend rep; usize i; constexpr itr(const usize x) noexcept : i(x) {} public: void operator++() noexcept { ++i; } constexpr usize operator*() const noexcept { return i; } constexpr bool operator!=(const itr x) const noexcept { return i != x.i; } }; constexpr rep(const usize first, const usize last) noexcept : f(first), l(last) {} constexpr itr begin() const noexcept { return itr(f); } constexpr itr end() const noexcept { return itr(l); } }; class revrep { const usize f, l; public: class itr { friend revrep; usize i; constexpr itr(usize x) noexcept : i(x) {} public: void operator++() noexcept { --i; } constexpr usize operator*() const noexcept { return i; } constexpr bool operator!=(const itr x) const noexcept { return i != x.i; } }; constexpr revrep(usize first, usize last) noexcept : f(--first), l(--last) {} constexpr itr begin() const noexcept { return itr(l); } constexpr itr end() const noexcept { return itr(f); } }; template <class T> using vec_alias = std::vector<T>; template <class T> auto md_vec(const usize n, const T &value) { return std::vector<T>(n, value); } template <class... Args> auto md_vec(const usize n, Args... args) { return std::vector<decltype(md_vec(args...))>(n, md_vec(args...)); } template <class T> constexpr T difference(const T &a, const T &b) { return a < b ? b - a : a - b; } } // namespace n91 #include <cassert> #include <cstdint> namespace n91 { template <std::uint_least32_t Modulus> class modint { using u32 = std::uint_least32_t; using u64 = std::uint_least64_t; using i64 = std::int_fast64_t; class optimize_tag_t {}; static constexpr optimize_tag_t optimize_tag{}; public: using value_type = u32; value_type a; private: static constexpr value_type cst(i64 x) noexcept { x %= static_cast<i64>(Modulus); if (x < static_cast<i64>(0)) { x += static_cast<i64>(Modulus); } return static_cast<value_type>(x); } constexpr modint(optimize_tag_t, const value_type &x) noexcept : a(x) {} public: constexpr modint() noexcept : a(static_cast<value_type>(0)) {} constexpr modint(const i64 &x) noexcept : a(cst(x)) {} constexpr value_type value() const noexcept { return a; } constexpr modint operator+(const modint &o) const noexcept { return modint(optimize_tag, a + o.a < Modulus ? a + o.a : a + o.a - Modulus); } constexpr modint operator-(const modint &o) const noexcept { return modint(optimize_tag, a < o.a ? a + Modulus - o.a : a - o.a); } constexpr modint operator*(const modint &o) const noexcept { return modint( optimize_tag, static_cast<value_type>(static_cast<u64>(a) * static_cast<u64>(o.a) % static_cast<u64>(Modulus))); } constexpr modint operator/(const modint &o) const { return modint( optimize_tag, static_cast<value_type>(static_cast<u64>(a) * static_cast<u64>((~o).a) % static_cast<u64>(Modulus))); } modint &operator+=(const modint &o) noexcept { if ((a += o.a) >= Modulus) a -= Modulus; return *this; } modint &operator-=(const modint &o) noexcept { if (a < o.a) a += Modulus; a -= o.a; return *this; } modint &operator*=(const modint &o) noexcept { a = static_cast<value_type>(static_cast<u64>(a) * static_cast<u64>(o.a) % static_cast<u64>(Modulus)); return *this; } modint &operator/=(const modint &o) { a = static_cast<u64>(a) * (~o).a % Modulus; return *this; } constexpr modint inverse() const noexcept { assert(a != static_cast<value_type>(0) && "0 does not have inverse"); return pow(static_cast<u64>(Modulus - static_cast<value_type>(2))); } constexpr modint operator~() const noexcept { return inverse(); } constexpr modint operator-() const noexcept { if (a == static_cast<value_type>(0)) { return modint(optimize_tag, static_cast<value_type>(0)); } else { return modint(optimize_tag, Modulus - a); } } modint &operator++() noexcept { if (++a == Modulus) { a = static_cast<value_type>(0); } return *this; } modint &operator--() noexcept { if (a == static_cast<value_type>(0)) { a = Modulus; } --a; return *this; } constexpr bool operator==(const modint &o) const noexcept { return a == o.a; } constexpr bool operator!=(const modint &o) const noexcept { return a != o.a; } constexpr bool operator<(const modint &o) const noexcept { return a < o.a; } constexpr bool operator<=(const modint &o) const noexcept { return a <= o.a; } constexpr bool operator>(const modint &o) const noexcept { return a > o.a; } constexpr bool operator>=(const modint &o) const noexcept { return a >= o.a; } constexpr explicit operator bool() const noexcept { return a; } constexpr explicit operator value_type() const noexcept { return a; } modint pow(u64 x) const noexcept { u64 t = a, u = 1; while (x) { if (x & 1) u = u * t % Modulus; t = (t * t) % Modulus; x >>= 1; } return modint(optimize_tag, static_cast<value_type>(u)); } }; } // namespace n91 #include <algorithm> #include <iostream> #include <utility> #include <array> namespace n91 { void main_() { using mint = modint<1000000007>; usize n; u32 m, d1, d2; std::cin >> n >> m >> d1 >> d2; --n; if (m <= d1*n) { std::cout << 0 << std::endl; return; } m -= d1*n; const u32 d = d2 - d1 + 1; std::vector<mint> fact(m + n+1); fact[0] = 1; for (const auto i : rep(1, m + n+1)) { fact[i] = fact[i - 1] * i; } mint ans = 0; const mint m_ = m, n_ = n, d_ = d; for (usize i = 0;d*i < m&&i <= n;++i) { const usize x = d*i; const mint x_ = x; mint temp = (m_ + n_ - x_ - 1)*(m_ + n_ - x_)*fact[m + n - d*i - 2] / (n_ + 1) / fact[n - i] / fact[i] / fact[m - d*i - 1]; if (i % 2 == 0) { ans += temp; } else { ans -= temp; } } std::cout << ans.a << std::endl; } } // namespace n91 int main() { n91::main_(); return 0; }