#585233 (C++17) No.1299 Random Array Score

提出ソース

結果

問題	No.1299 Random Array Score
ユーザー	kcvlex
提出日時	2020-11-27 21:41:51
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	79 ms / 2,000 ms
コード長	6,463 bytes
コンパイル時間	1,654 ms
コンパイル使用メモリ	147,356 KB
実行使用メモリ	6,944 KB
最終ジャッジ日時	2024-07-26 12:03:29
合計ジャッジ時間	4,471 ms
ジャッジサーバーID （参考情報）	judge4 / 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	AC	2 ms 6,816 KB
testcase_01	AC	1 ms 6,944 KB
testcase_02	AC	1 ms 6,944 KB
testcase_03	AC	76 ms 6,940 KB
testcase_04	AC	76 ms 6,940 KB
testcase_05	AC	60 ms 6,940 KB
testcase_06	AC	53 ms 6,940 KB
testcase_07	AC	55 ms 6,940 KB
testcase_08	AC	75 ms 6,944 KB
testcase_09	AC	4 ms 6,944 KB
testcase_10	AC	30 ms 6,944 KB
testcase_11	AC	9 ms 6,944 KB
testcase_12	AC	50 ms 6,940 KB
testcase_13	AC	74 ms 6,940 KB
testcase_14	AC	52 ms 6,944 KB
testcase_15	AC	53 ms 6,940 KB
testcase_16	AC	52 ms 6,944 KB
testcase_17	AC	12 ms 6,940 KB
testcase_18	AC	33 ms 6,940 KB
testcase_19	AC	40 ms 6,944 KB
testcase_20	AC	22 ms 6,944 KB
testcase_21	AC	3 ms 6,940 KB
testcase_22	AC	14 ms 6,944 KB
testcase_23	AC	53 ms 6,944 KB
testcase_24	AC	60 ms 6,940 KB
testcase_25	AC	50 ms 6,940 KB
testcase_26	AC	3 ms 6,944 KB
testcase_27	AC	15 ms 6,944 KB
testcase_28	AC	10 ms 6,940 KB
testcase_29	AC	17 ms 6,940 KB
testcase_30	AC	49 ms 6,940 KB
testcase_31	AC	18 ms 6,940 KB
testcase_32	AC	73 ms 6,940 KB
testcase_33	AC	79 ms 6,944 KB
testcase_34	AC	68 ms 6,940 KB
testcase_35	AC	28 ms 6,944 KB
testcase_36	AC	16 ms 6,940 KB

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ソースコード

raw source code

#include <limits>
#include <initializer_list>
#include <utility>
#include <bitset>
#include <tuple>
#include <type_traits>
#include <functional>
#include <string>
#include <array>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <iterator>
#include <algorithm>
#include <complex>
#include <random>
#include <numeric>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <regex>
#include <cassert>
#include <cstddef>
#include <variant>

#define endl codeforces

#define ALL(v) std::begin(v), std::end(v)
#define ALLR(v) std::rbegin(v), std::rend(v)

using ll = std::int64_t;
using ull = std::uint64_t;
using pii = std::pair<int, int>;
using tii = std::tuple<int, int, int>;
using pll = std::pair<ll, ll>;
using tll = std::tuple<ll, ll, ll>;
using size_type = ssize_t;
template <typename T> using vec = std::vector<T>;
template <typename T> using vvec = vec<vec<T>>;

template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return std::min(t, var_min(tail...)); }
template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return std::max(t, var_max(tail...)); }
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }

template <typename T, std::size_t Head, std::size_t... Tail> 
struct multi_dim_array { using type = std::array<typename multi_dim_array<T, Tail...>::type, Head>; };

template <typename T, std::size_t Head> 
struct multi_dim_array<T, Head> { using type = std::array<T, Head>; };

template <typename T, std::size_t... Args> using mdarray = typename multi_dim_array<T, Args...>::type;

template <typename T, typename F, typename... Args> 
void fill_seq(T &t, F f, Args... args) { 
    if constexpr (std::is_invocable<F, Args...>::value) { 
        t = f(args...); 
    } else { 
        for (size_type i = 0; i < t.size(); i++) fill_seq(t[i], f, args..., i); 
    } 
}

template <typename T> vec<T> make_v(size_type sz) { return vec<T>(sz); }

template <typename T, typename... Tail> 
auto make_v(size_type hs, Tail&&... ts) { 
    auto v = std::move(make_v<T>(std::forward<Tail>(ts)...)); 
    return vec<decltype(v)>(hs, v); 
}

namespace init__ { 
struct InitIO { 
    InitIO() { 
        std::cin.tie(nullptr); 
        std::ios_base::sync_with_stdio(false); 
        std::cout << std::fixed << std::setprecision(30); 
    } 
} init_io; 
}

template <typename T>
T ceil_pow2(T bound) {
    T ret = 1;
    while (ret < bound) ret *= 2;
    return ret;
}

template <typename T>
T ceil_div(T a, T b) { return a / b + !!(a % b); }


namespace math {

template <typename T>
constexpr T mul_id_ele() {
    if constexpr (std::is_fundamental<T>::value) {
        return T(1);
    } else {
        return T::mul_id_ele();
    }
}

template <typename T>
constexpr T add_id_ele() {
    if constexpr (std::is_fundamental<T>::value) {
        return T(0);
    } else {
        return T::add_id_ele();
    }
}

template <typename T>
constexpr T pow(const T &n, ll k) {
    T ret = mul_id_ele<T>();
    T cur = n;
    while (k) {
        if (k & 1) ret *= cur;
        cur *= cur;
        k /= 2;
    }
    return ret;
}


template <typename T>
typename std::enable_if<std::is_integral<T>::value, T>::type
gcd(T a, T b) { return b ? gcd(a % b, b) : a; }

}

namespace math {

template <ull Mod>
struct Modint {

    constexpr Modint(ll x) noexcept : x((Mod + x % static_cast<ll>(Mod)) % Mod) { }
    constexpr Modint() noexcept : Modint(0) { }
    
    constexpr static Modint add_id_ele() { 
        return Modint(0); 
    }
    
    constexpr static Modint mul_id_ele() {
        return Modint(1);
    }
    
    constexpr ll value() const noexcept { 
        return static_cast<ll>(x);
    }

    constexpr Modint& operator+=(const Modint &oth) noexcept {
        x += oth.value();
        if (Mod <= x) x -= Mod;
        return *this;
    }

    constexpr Modint& operator-=(const Modint &oth) noexcept {
        x += Mod - oth.value();
        if (Mod <= x) x -= Mod;
        return *this;
    }

    constexpr Modint& operator*=(const Modint &oth) noexcept {
        x *= oth.value();
        x %= Mod;
        return *this;
    }

    constexpr Modint& operator/=(const Modint &oth) noexcept {
        x *= oth.inv().value();
        x %= Mod;
        return *this;
    }

    constexpr Modint operator+(const Modint &oth) const noexcept {
        return Modint(x) += oth;
    }

    constexpr Modint operator-(const Modint &oth) const noexcept {
        return Modint(x) -= oth;
    }

    constexpr Modint operator*(const Modint &oth) const noexcept {
        return Modint(x) *= oth;
    }

    constexpr Modint operator/(const Modint &oth) const noexcept {
        return Modint(x) /= oth;
    }

    constexpr Modint operator-() const noexcept {
        return Modint((x != 0) * (Mod - x)); 
    }

    constexpr bool operator==(const Modint &oth) const noexcept {
        return value() == oth.value();
    }

    template <typename T>
    constexpr typename std::enable_if<std::is_integral<T>::value, const Modint&>::type
    operator=(T t) noexcept {
        (*this) = Modint(std::forward<T>(t)); 
        return *this;
    }

    constexpr Modint inv() const noexcept {
        return ::math::pow(*this, Mod - 2);
    }

    constexpr ull mod() const noexcept {
        return Mod;
    }

private:
    ull x;
};

template <ull Mod>
Modint<Mod> inv(Modint<Mod> m) {
    return m.inv();
}

template <ull Mod>
std::istream& operator>>(std::istream &is, Modint<Mod> &m) {
    ll v;
    is >> v;
    m = v;
    return is;
}

template <ull Mod>
std::ostream& operator<<(std::ostream &os, Modint<Mod> m) {
    os << m.value();
    return os;
}

}

constexpr ll mod = 998'244'353;
using mint = math::Modint<mod>;

int main() {
    ll n, k;
    std::cin >> n >> k;
    vec<mint> av(n);
    for (auto &e : av) std::cin >> e;
    mint ans = 0;
    for (auto e : av) {
        e *= n;
        auto p = (pow(mint(2), k) - 1) * e;
        ans += p;
    }
    ans /= n;
    ans += std::accumulate(ALL(av), mint(0));
    std::cout << ans << "\n";
    return 0;
}

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結果

テストケース

ソースコード