結果
問題 |
No.681 Fractal Gravity Glue
|
ユーザー |
|
提出日時 | 2018-04-28 00:15:28 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 1,476 bytes |
コンパイル時間 | 2,178 ms |
コンパイル使用メモリ | 194,972 KB |
最終ジャッジ日時 | 2025-01-05 10:27:17 |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
other | AC * 12 RE * 5 MLE * 3 |
ソースコード
#include <bits/stdc++.h> #define show(x) cerr << #x << " = " << x << endl using namespace std; using ll = long long; using ld = long double; constexpr ll MOD = 1000000007LL; template <typename T> constexpr T INF = numeric_limits<T>::max() / 10; template <typename Functor> struct fix_type { Functor functor; template <typename... Args> decltype(auto) operator()(Args&&... args) const& { return functor(functor, std::forward<Args>(args)...); } }; template <typename Functor> fix_type<typename std::decay<Functor>::type> fix(Functor&& functor) { return {std::forward<Functor>(functor)}; } int main() { ll N, B, D; cin >> N >> B >> D; vector<ll> stone(B); stone[0] = D; for (int i = 1; i < B; i++) { stone[i] = (stone[i - 1] * (D + 1) % MOD + D * (i + 1) % MOD) % MOD; } ll ans = 0; ll rest = N; auto rec = fix([&](auto&& self) { int ind = 0; ll H = D + 1; for (; H - 1 <= rest; ind++, H *= (D + 1)) { } if (ind == 0) { ans += rest; return; } const ll h = H / (D + 1); const ll sub = (stone[ind - 1] + (ind + 1)) % MOD; const ll rep = rest / h; rest = rest % h; (ans += rep * sub % MOD) %= MOD; if (rest == h - 1) { (ans += stone[ind - 1]) %= MOD; rest = 0; } self(self); }); rec(); cout << (stone[B - 1] + MOD - ans) % MOD << endl; return 0; }