結果
問題 | No.1039 Project Euler でやれ |
ユーザー | risujiroh |
提出日時 | 2020-04-24 23:16:39 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,767 bytes |
コンパイル時間 | 2,955 ms |
コンパイル使用メモリ | 230,812 KB |
実行使用メモリ | 14,924 KB |
最終ジャッジ日時 | 2024-10-15 03:48:52 |
合計ジャッジ時間 | 4,059 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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 | WA | - |
testcase_01 | AC | 157 ms
9,344 KB |
testcase_02 | WA | - |
testcase_03 | AC | 21 ms
14,848 KB |
testcase_04 | AC | 21 ms
14,924 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | AC | 2 ms
5,248 KB |
testcase_17 | AC | 1 ms
5,248 KB |
testcase_18 | AC | 2 ms
5,248 KB |
testcase_19 | AC | 2 ms
5,248 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #ifdef LOCAL #include "debug.h" #else #define DEBUG(...) #endif template <class T, class Op = multiplies<T>> constexpr T power(T a, long long n, Op op = Op(), T e = {1}) { assert(n >= 0); while (n) { if (n & 1) e = op(e, a); if (n >>= 1) a = op(a, a); } return e; } template <unsigned M> struct modular { using m = modular; static constexpr unsigned mod = M; unsigned v; modular(long long x = 0) : v((x %= mod) < 0 ? x + mod : x) {} m operator-() const { return m() -= *this; } m& operator+=(m b) { if ((int)(v += b.v - mod) < 0) v += mod; return *this; } m& operator-=(m b) { if ((int)(v -= b.v) < 0) v += mod; return *this; } m& operator*=(m b) { v = (uint64_t)v * b.v % mod; return *this; } m& operator/=(m b) { return *this *= power(b, mod - 2); } friend m operator+(m a, m b) { return a += b; } friend m operator-(m a, m b) { return a -= b; } friend m operator*(m a, m b) { return a *= b; } friend m operator/(m a, m b) { return a /= b; } friend bool operator==(m a, m b) { return a.v == b.v; } }; using mint = modular<power(10, 9) + 7>; vector<mint> fact, inv_fact, minv; void prepare(int n) { fact.resize(n + 1), inv_fact.resize(n + 1), minv.resize(n + 1); for (int i = 0; i <= n; ++i) fact[i] = i ? fact[i - 1] * i : 1; inv_fact[n] = power(fact[n], mint::mod - 2); for (int i = n; i--; ) inv_fact[i] = (i + 1) * inv_fact[i + 1]; for (int i = 1; i <= n; ++i) minv[i] = inv_fact[i] * fact[i - 1]; } mint binom(int n, int k) { if (k < 0 or k > n) return 0; return fact[n] * inv_fact[k] * inv_fact[n - k]; } template <> mint& mint::operator/=(mint b) { return *this *= b.v < minv.size() ? minv[b.v] : power(b, mod - 2); } template <class T> map<T, int> factorize(T n) { map<T, int> res; for (T i = 2; i * i <= n; ++i) while (n % i == 0) ++res[i], n /= i; if (n != 1) ++res[n]; return res; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int n; cin >> n; prepare(n); mint res; auto fn = [&](auto&& ep) { DEBUG(ep); int m = size(ep); vector<int> c(m); for (int i = 0; i < m; ++i) { c[i] = i and ep[i].first == ep[i - 1].first ? c[i - 1] : i; // c[i] = i and ep[i] == ep[i - 1] ? c[i - 1] : i; } vector<int> d(m); for (int i = m; i--; ) { d[i] = i < m - 1 and ep[i].first == ep[i + 1].first ? d[i + 1] : i; // d[i] = i < m - 1 and ep[i] == ep[i + 1] ? d[i + 1] : i; } mint cur = 1; int k = 0; for (int i = 0; i < m; ++i) { int e = ep[i].first; mint p = ep[i].second; cur *= power(p, d[i] + 1) - power(p, i); cur *= power(p, e * (m - d[i] - 1)); cur *= power(p, (e - 1) * (m - c[i])); k += i == 0 or ep[i - 1].second != ep[i].second; } DEBUG(cur); res += power(n, 0) * fact[n] / cur; }; auto mp = factorize(n); auto it = begin(mp); vector<pair<int, int>> v; set<vector<pair<int, int>>> se; auto dfs = [&](auto&& self) -> void { if (it == end(mp)) { auto sv = v; sort(begin(sv), end(sv)); if (not se.count(sv)) { se.emplace(sv); fn(sv); } return; } for (int bt = 0; bt < 1 << (it->second - 1); ++bt) { vector<int> p{0}; for (int i = 0; i < it->second - 1; ++i) { if (bt >> i & 1) { p.push_back(i + 1); } } p.push_back(it->second); int c = size(p) - 1; for (int i = 0; i < c; ++i) { v.emplace_back(p[i + 1] - p[i], it->first); } ++it; self(self); --it; v.erase(end(v) - c, end(v)); } }; dfs(dfs); // fn(vector<pair<int, int>>{{1, 2}, {1, 3}}); // fn(vector<pair<int, int>>{{1, 3}, {1, 2}}); cout << res.v << '\n'; }