結果
問題 | No.1011 Infinite Stairs |
ユーザー | kyo1 |
提出日時 | 2020-12-18 17:45:39 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 193 ms / 2,000 ms |
コード長 | 6,287 bytes |
コンパイル時間 | 2,092 ms |
コンパイル使用メモリ | 205,788 KB |
実行使用メモリ | 109,440 KB |
最終ジャッジ日時 | 2024-07-17 12:15:49 |
合計ジャッジ時間 | 3,658 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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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
6,812 KB |
testcase_01 | AC | 2 ms
6,940 KB |
testcase_02 | AC | 4 ms
6,940 KB |
testcase_03 | AC | 128 ms
73,216 KB |
testcase_04 | AC | 21 ms
15,104 KB |
testcase_05 | AC | 193 ms
109,440 KB |
testcase_06 | AC | 2 ms
6,944 KB |
testcase_07 | AC | 3 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 3 ms
6,940 KB |
testcase_11 | AC | 25 ms
17,536 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 16 ms
11,776 KB |
testcase_14 | AC | 3 ms
6,944 KB |
testcase_15 | AC | 20 ms
14,592 KB |
testcase_16 | AC | 91 ms
52,736 KB |
testcase_17 | AC | 8 ms
7,296 KB |
testcase_18 | AC | 54 ms
31,488 KB |
testcase_19 | AC | 3 ms
6,944 KB |
testcase_20 | AC | 2 ms
6,944 KB |
testcase_21 | AC | 20 ms
14,720 KB |
testcase_22 | AC | 38 ms
26,240 KB |
testcase_23 | AC | 23 ms
17,024 KB |
testcase_24 | AC | 26 ms
18,176 KB |
testcase_25 | AC | 40 ms
27,648 KB |
testcase_26 | AC | 10 ms
8,064 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; template <typename T> T inverse(T a, T m) { T u = 0, v = 1; while (a != 0) { T t = m / a; m -= t * a; u -= t * v; std::swap(a, m); std::swap(u, v); } assert(m == 1); return u; } template <typename T> class Modular { public: using Type = std::decay_t<decltype(T::value)>; constexpr Modular() : value() {} template <typename U> Modular(const U &x) : value(normalize(x)) {} template <typename U> Type normalize(const U &x) { Type v; if (-mod <= x && x < mod) { v = static_cast<Type>(x); } else { v = static_cast<Type>(x % mod); } if (v < 0) v += mod; return v; } const Type &operator()() const { return value; } template <typename U> explicit operator U() const { return static_cast<U>(value); } constexpr static Type mod = T::value; Modular &operator+=(const Modular &rhs) { if ((value += rhs.value) >= mod) value -= mod; return *this; } Modular &operator-=(const Modular &rhs) { if ((value -= rhs.value) < 0) value += mod; return *this; } template <typename U> Modular &operator+=(const U &rhs) { return *this += Modular(rhs); } template <typename U> Modular &operator-=(const U &rhs) { return *this -= Modular(rhs); } Modular &operator++() { return *this += 1; } Modular &operator--() { return *this -= 1; } Modular operator++(int) { Modular res(*this); *this += 1; return res; } Modular operator--(int) { Modular res(*this); *this -= 1; return res; } template <typename U = T> std::enable_if_t<std::is_same<typename Modular<U>::Type, int>::value, Modular> &operator*=( const Modular &rhs) { value = normalize(static_cast<int64_t>(value) * static_cast<int64_t>(rhs.value)); return *this; } template <typename U = T> std::enable_if_t<std::is_same<typename Modular<U>::Type, int64_t>::value, Modular> &operator*=( const Modular &rhs) { value = normalize(static_cast<__int128>(value) * static_cast<__int128>(rhs.value)); return *this; } Modular &operator/=(const Modular &rhs) { return *this *= Modular(inverse(rhs.value, mod)); } template <typename U> friend bool operator==(const Modular<U> &lhs, const Modular<U> &rhs); template <typename U> friend bool operator<(const Modular<U> &lhs, const Modular<U> &rhs); template <typename U> friend bool operator>(const Modular<U> &lhs, const Modular<U> &rhs); template <typename U> friend std::istream &operator>>(std::istream &stream, Modular<U> &rhs); template <typename U> friend std::ostream &operator<<(std::ostream &stream, const Modular<U> &rhs); private: Type value; }; template <typename T> bool operator==(const Modular<T> &lhs, const Modular<T> &rhs) { return lhs.value == rhs.value; } template <typename T, typename U> bool operator==(const Modular<T> &lhs, U rhs) { return lhs == Modular<T>(rhs); } template <typename T, typename U> bool operator==(U lhs, const Modular<T> &rhs) { return Modular<T>(lhs) == rhs; } template <typename T> bool operator!=(const Modular<T> &lhs, const Modular<T> &rhs) { return !(lhs == rhs); } template <typename T, typename U> bool operator!=(const Modular<T> &lhs, U rhs) { return !(lhs == rhs); } template <typename T, typename U> bool operator!=(U lhs, const Modular<T> &rhs) { return !(lhs == rhs); } template <typename T> bool operator<(const Modular<T> &lhs, const Modular<T> &rhs) { return lhs.value < rhs.value; } template <typename T> bool operator>(const Modular<T> &lhs, const Modular<T> &rhs) { return lhs.value > rhs.value; } template <typename T> Modular<T> operator+(const Modular<T> &lhs, const Modular<T> &rhs) { return Modular<T>(lhs) += rhs; } template <typename T, typename U> Modular<T> operator+(const Modular<T> &lhs, U rhs) { return Modular<T>(lhs) += rhs; } template <typename T, typename U> Modular<T> operator+(U lhs, const Modular<T> &rhs) { return Modular<T>(lhs) += rhs; } template <typename T> Modular<T> operator-(const Modular<T> &lhs, const Modular<T> &rhs) { return Modular<T>(lhs) -= rhs; } template <typename T, typename U> Modular<T> operator-(const Modular<T> &lhs, U rhs) { return Modular<T>(lhs) -= rhs; } template <typename T, typename U> Modular<T> operator-(U lhs, const Modular<T> &rhs) { return Modular<T>(lhs) -= rhs; } template <typename T> Modular<T> operator*(const Modular<T> &lhs, const Modular<T> &rhs) { return Modular<T>(lhs) *= rhs; } template <typename T, typename U> Modular<T> operator*(const Modular<T> &lhs, U rhs) { return Modular<T>(lhs) *= rhs; } template <typename T, typename U> Modular<T> operator*(U lhs, const Modular<T> &rhs) { return Modular<T>(lhs) *= rhs; } template <typename T> Modular<T> operator/(const Modular<T> &lhs, const Modular<T> &rhs) { return Modular<T>(lhs) /= rhs; } template <typename T, typename U> Modular<T> operator/(const Modular<T> &lhs, U rhs) { return Modular<T>(lhs) /= rhs; } template <typename T, typename U> Modular<T> operator/(U lhs, const Modular<T> &rhs) { return Modular<T>(lhs) /= rhs; } template <typename T, typename U> Modular<T> pow(const Modular<T> &a, const U &b) { assert(b >= 0); Modular<T> x = a, res = 1; U n = b; while (n > 0) { if (n & 1) res *= x; x *= x; n >>= 1; } return res; } template <typename T> std::istream &operator>>(std::istream &stream, Modular<T> &rhs) { typename std::common_type<typename Modular<T>::Type, int64_t>::type x; stream >> x; rhs = Modular<T>(x); return stream; } template <typename T> std::ostream &operator<<(std::ostream &stream, const Modular<T> &rhs) { stream << rhs.value; return stream; } constexpr int mod = 1000000007; // constexpr int mod = 998244353; using mint = Modular<std::integral_constant<std::decay_t<decltype(mod)>, mod>>; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int N, D, K; cin >> N >> D >> K; vector<vector<mint>> dp(N + 1, vector<mint>(K + 2, 0)); dp[0][0] = 1; for (int i = 0; i < N; i++) { for (int k = 0; k < K; k++) { dp[i + 1][k + 1] += dp[i][k]; dp[i + 1][min(K + 1, k + D + 1)] -= dp[i][k]; dp[i + 1][k + 1] += dp[i + 1][k]; } } cout << dp[N][K] << '\n'; return 0; }