結果
問題 | No.1554 array_and_me |
ユーザー | theory_and_me |
提出日時 | 2021-05-02 15:39:02 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 5,607 bytes |
コンパイル時間 | 2,334 ms |
コンパイル使用メモリ | 214,676 KB |
実行使用メモリ | 7,180 KB |
最終ジャッジ日時 | 2024-06-22 19:30:38 |
合計ジャッジ時間 | 5,033 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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テストケース
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ソースコード
#include <bits/stdc++.h> using namespace std; #define REP(i,n) for(ll i=0;i<(ll)n;i++) #define dump(x) cerr << "Line " << __LINE__ << ": " << #x << " = " << (x) << "\n"; #define spa << " " << #define fi first #define se second #define ALL(a) (a).begin(),(a).end() #define ALLR(a) (a).rbegin(),(a).rend() using ld = long double; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using pdd = pair<ld, ld>; template<typename T> using V = vector<T>; template<typename T> using P = pair<T, T>; template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); } template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); } template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){os << "(" << v.first << ", " << v.second << ")"; return os;} template<typename T> ostream& operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; } template<class T> ostream& operator<<(ostream& os, const vector<vector<T>> &v){ for(auto &e : v){os << e << "\n";} return os;} struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(3); }; } fast_ios_; template <class T> void UNIQUE(vector<T> &x) {sort(ALL(x));x.erase(unique(ALL(x)), x.end());} template<class T> bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; } template<class T> bool chmin(T &a, const T &b) { if (a>b) { a=b; return 1; } return 0; } void fail() { cout << -1 << '\n'; exit(0); } inline int popcount(const int x) { return __builtin_popcount(x); } inline int popcount(const ll x) { return __builtin_popcountll(x); } template<typename T> void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++) {cerr<<v[i][0];for(ll j=1;j<w;j++)cerr spa v[i][j];cerr<<"\n";}}; template<typename T> void debug(vector<T>&v,ll n){if(n!=0)cerr<<v[0]; for(ll i=1;i<n;i++)cerr spa v[i]; cerr<<"\n";}; const ll INF = (1ll<<62); // const ld EPS = 1e-10; // const ld PI = acos(-1.0); // const ll mod = (int)1e9 + 7; const ll mod = 998244353; template <std::uint_fast64_t Modulus> class modint { // long long から modint を作るときは必ず正の数にしてからコンストラクタに入れること! // そうしないとバグります using u64 = std::uint_fast64_t; public: u64 a; constexpr modint(const u64 x = 0) noexcept : a(x % Modulus) {} constexpr u64 &value() noexcept { return a; } constexpr const u64 &value() const noexcept { return a; } 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 { a += rhs.a; if (a >= Modulus) { a -= Modulus; } return *this; } constexpr modint &operator-=(const modint rhs) noexcept { if (a < rhs.a) { a += Modulus; } a -= rhs.a; return *this; } constexpr modint &operator*=(const modint rhs) noexcept { a = a * rhs.a % Modulus; return *this; } constexpr modint &operator/=(modint rhs) noexcept { u64 exp = Modulus - 2; while (exp) { if (exp % 2) { *this *= rhs; } rhs *= rhs; exp /= 2; } return *this; } }; using mint = modint<mod>; using vm = vector<mint>; using vvm = vector<vm>; ostream& operator << (ostream& os, const mint v){ os << v.value(); return os; } template <class T, class U> constexpr T power(T x, U exp) { T ret = static_cast<T>(1); while (exp) { if (exp % static_cast<U>(2) == static_cast<U>(1)) ret *= x; exp /= static_cast<U>(2); x *= x; } return ::std::move(ret); } double calculate_objective_log(vector<int> &x, vector<int> &A){ int N = A.size(); double res = 0; vector<double> log_factoral(101010, 0); for(int i=1;i<101010;i++) log_factoral[i] = log_factoral[i-1] + log(i); for(int i=0;i<N;i++){ res += x[i] * log(A[i]) - log_factoral[x[i]]; } return res; } mint calculate_objective_mod(vector<int> &x, vector<int> &A, int K){ int N = A.size(); int A_sum = 0; for(int i=0;i<N;i++) A_sum += A[i]; mint res = 1; for(int i=1;i<=K;i++) res *= i; for(int i=0;i<N;i++){ for(int j=1;j<=x[i];j++) res /= j; } for(int i=0;i<N;i++){ mint y = A[i]; y /= A_sum; for(int j=1;j<=x[i];j++) res *= y; } return res; } void solve(){ int N, K; cin >> N >> K; vector<int> A(N); for(int i=0;i<N;i++) cin >> A[i]; int A_sum = 0; for(int i=0;i<N;i++) A_sum += A[i]; vector<int> x(N, 0); vector<double> q(N, 0); int x_sum = 0; REP(i, N){ x[i] = K * A[i] / A_sum; q[i] = (double) K * A[i] / A_sum; x_sum += x[i]; } // dump(x) // dump(q) int nokori = K - x_sum; vector<pll> r; for(int i=0;i<N;i++){ r.emplace_back(q[i]/(x[i]+1), i); } sort(r.rbegin(), r.rend()); for(int i=0;i<nokori;i++){ x[r[i].second]++; } // dump(x) // dump(calculate_objective_log(x, A)); mint res = calculate_objective_mod(x, A, K); cout << res << endl; return; } int main(){ int T; cin >> T; while(T--){ solve(); } }