結果
問題 | No.125 悪の花弁 |
ユーザー | fine |
提出日時 | 2020-07-07 01:13:48 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,476 bytes |
コンパイル時間 | 2,073 ms |
コンパイル使用メモリ | 180,880 KB |
実行使用メモリ | 19,256 KB |
最終ジャッジ日時 | 2024-09-25 01:57:15 |
合計ジャッジ時間 | 2,707 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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 | 36 ms
19,232 KB |
testcase_02 | AC | 37 ms
19,104 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; constexpr char newl = '\n'; // https://noshi91.hatenablog.com/entry/2019/03/31/174006 template <std::uint_fast64_t Modulus> struct ModInt { using u64 = std::uint_fast64_t; static constexpr u64 MOD = Modulus; u64 val; constexpr ModInt(const u64 x = 0) noexcept : val(x % MOD) {} constexpr ModInt operator+() const noexcept { return ModInt(*this); } constexpr ModInt operator-() const noexcept { ModInt res(*this); if (res.val != 0) res.val = MOD - res.val; return res; } constexpr bool operator==(const ModInt& rhs) const noexcept { return val == rhs.val; } constexpr bool operator!=(const ModInt& rhs) const noexcept { return val != rhs.val; } // prefix increment/decrement constexpr ModInt& operator++() noexcept { return *this += ModInt(1); } constexpr ModInt& operator--() noexcept { return *this -= ModInt(1); } // postfix increment/decrement constexpr ModInt operator++(int) noexcept { ModInt tmp(*this); ++*this; return tmp; } constexpr ModInt operator--(int) noexcept { ModInt tmp(*this); --*this; return tmp; } constexpr ModInt operator+(const ModInt& rhs) const noexcept { return ModInt(*this) += rhs; } constexpr ModInt operator-(const ModInt& rhs) const noexcept { return ModInt(*this) -= rhs; } constexpr ModInt operator*(const ModInt& rhs) const noexcept { return ModInt(*this) *= rhs; } constexpr ModInt operator/(const ModInt& rhs) const noexcept { return ModInt(*this) /= rhs; } constexpr ModInt& operator+=(const ModInt& rhs) noexcept { val += rhs.val; if (val >= MOD) val -= MOD; return *this; } constexpr ModInt& operator-=(const ModInt& rhs) noexcept { if (val < rhs.val) val += MOD; val -= rhs.val; return *this; } constexpr ModInt& operator*=(const ModInt& rhs) noexcept { val = val * rhs.val % MOD; return *this; } // prime Modulus only constexpr ModInt& operator/=(const ModInt& rhs) noexcept { return *this *= rhs.inv(); } // prime Modulus only constexpr ModInt inv() const noexcept { return pow(*this, MOD - 2); } }; template<std::uint_fast64_t Modulus> constexpr ModInt<Modulus> pow(ModInt<Modulus> x, std::uint_fast64_t n) { ModInt<Modulus> res(1); while (n) { if (n & 1) res *= x; x *= x; n >>= 1; } return res; } template<std::uint_fast64_t Modulus> istream& operator>>(istream& is, ModInt<Modulus>& x) { std::uint_fast64_t val; is >> val; x = ModInt<Modulus>(val); return is; } template<std::uint_fast64_t Modulus> ostream& operator<<(ostream& os, const ModInt<Modulus>& x) { return os << x.val; } using mint = ModInt<1000000007>; // g++ -Wl,--stack,[STACK SIZE] [file] でスタックサイズを増やすか、 // グローバル変数として宣言して使うこと!!! template<size_t MAXV, class T = mint> struct Comb { array<T, MAXV + 1> fact, fact_inv; constexpr Comb() noexcept { fact[0] = 1; for (size_t i = 1; i <= MAXV; i++) { fact[i] = fact[i - 1] * i; } fact_inv[MAXV] = fact[MAXV].inv(); for (size_t i = MAXV; i > 0; i--) { fact_inv[i - 1] = fact_inv[i] * i; } } constexpr T operator()(int n, int k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact[n] * fact_inv[k] * fact_inv[n - k]; } constexpr T perm(int n, int k) const noexcept { if (n < k || n < 0 || k < 0) return 0; return fact[n] * fact_inv[n - k]; } }; const Comb<1000000> comb; template<typename T> vector<T> divisor(T n) { vector<T> res; for (T i = 1; i * i <= n; i++) { if (n % i == 0) { res.emplace_back(i); if (i != n / i) res.emplace_back(n / i); } } return res; } map<int, int> moebius(int n) { map<int, int> res; vector<int> primes; for (int i = 2; i * i <= n; i++) { if (n % i == 0) { primes.push_back(i); while (n % i == 0) n /= i; } } if (n != 1) primes.push_back(n); int m = primes.size(); for (int i = 0; i < (1 << m); i++) { int mu = 1, d = 1; for (int j = 0; j < m; j++) { if (i >> j & 1) { mu *= -1; d *= primes[j]; } } res[d] = mu; } return res; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int K; cin >> K; int sum = 0; vector<int> c(K); for (int i = 0; i < K; i++) { cin >> c[i]; sum += c[i]; } int g = sum; for (int i = 0; i < K; i++) { g = __gcd(g, c[i]); } vector<int> v = divisor(g); int sz = v.size(); map<int, int> meb = moebius(sum); mint ans = 0; vector<mint> dp(sz, 0); for (int i = sz - 1; i >= 0; i--) { int d = v[i]; int num = sum / d; dp[i] = comb.fact[num]; for (int j = 0; j < K; j++) { dp[i] /= comb.fact[c[j] / d]; } for (int j = i + 1; j < sz; j++) { dp[i] += dp[j] * (mint::MOD + meb[v[j]]); } ans += dp[i] / num; } cout << ans << newl; return 0; }