結果
問題 | No.1554 array_and_me |
ユーザー | theory_and_me |
提出日時 | 2021-05-02 15:37:42 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 54 ms / 2,000 ms |
コード長 | 5,668 bytes |
コンパイル時間 | 1,990 ms |
コンパイル使用メモリ | 210,760 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-06-22 19:30:14 |
合計ジャッジ時間 | 4,742 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
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 | 24 ms
6,816 KB |
testcase_02 | AC | 24 ms
6,940 KB |
testcase_03 | AC | 23 ms
6,944 KB |
testcase_04 | AC | 26 ms
6,944 KB |
testcase_05 | AC | 25 ms
6,940 KB |
testcase_06 | AC | 53 ms
6,940 KB |
testcase_07 | AC | 54 ms
6,940 KB |
testcase_08 | AC | 53 ms
6,944 KB |
testcase_09 | AC | 52 ms
6,940 KB |
testcase_10 | AC | 52 ms
6,940 KB |
testcase_11 | AC | 24 ms
6,940 KB |
testcase_12 | AC | 23 ms
6,944 KB |
testcase_13 | AC | 24 ms
6,944 KB |
testcase_14 | AC | 24 ms
6,944 KB |
testcase_15 | AC | 25 ms
6,944 KB |
testcase_16 | AC | 17 ms
6,940 KB |
testcase_17 | AC | 18 ms
6,940 KB |
testcase_18 | AC | 17 ms
6,944 KB |
testcase_19 | AC | 17 ms
6,944 KB |
testcase_20 | AC | 17 ms
6,944 KB |
testcase_21 | AC | 40 ms
6,940 KB |
testcase_22 | AC | 42 ms
6,940 KB |
testcase_23 | AC | 41 ms
6,940 KB |
testcase_24 | AC | 42 ms
6,940 KB |
testcase_25 | AC | 42 ms
6,940 KB |
testcase_26 | AC | 48 ms
6,940 KB |
testcase_27 | AC | 50 ms
6,940 KB |
testcase_28 | AC | 46 ms
6,944 KB |
testcase_29 | AC | 49 ms
6,944 KB |
testcase_30 | AC | 46 ms
6,940 KB |
testcase_31 | AC | 45 ms
6,940 KB |
testcase_32 | AC | 47 ms
6,940 KB |
testcase_33 | AC | 47 ms
6,940 KB |
testcase_34 | AC | 48 ms
6,944 KB |
testcase_35 | AC | 48 ms
6,940 KB |
testcase_36 | AC | 44 ms
6,944 KB |
testcase_37 | AC | 44 ms
6,944 KB |
testcase_38 | AC | 44 ms
6,940 KB |
testcase_39 | AC | 44 ms
6,940 KB |
testcase_40 | AC | 44 ms
6,944 KB |
testcase_41 | AC | 30 ms
6,940 KB |
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; } struct dat{ int idx, A_val, x_val; bool operator< (const dat &right)const{ return A_val * (right.x_val + 1) < right.A_val * (x_val + 1); } }; void solve(){ int N, K; cin >> N >> K; vector<int> A(N); for(int i=0;i<N;i++) cin >> A[i]; vector<int> x(N, 0); priority_queue<dat> pq; for(int i=0;i<N;i++) pq.push(dat{i, A[i], x[i]}); for(int i=0;i<K;i++){ auto p = pq.top();pq.pop(); x[p.idx]++; pq.push(dat{p.idx, A[p.idx], x[p.idx]}); } // dump(x) // dump(calculate_objective_log(x, A)); mint res = calculate_objective_mod(x, A, K); cout << res << endl; // int sum = 0; // for(int i=0;i<N;i++) sum += A[i]; // for(int i=0;i<N;i++) cout << (double)A[i] / sum * T << " "; // cout << endl; return; } int main(){ int T; cin >> T; while(T--){ solve(); } }