結果

問題 No.3101 Range Eratosthenes Query
コンテスト
ユーザー zawakasu
提出日時 2025-04-12 18:52:32
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 322 ms / 3,000 ms
コード長 6,916 bytes
コンパイル時間 1,436 ms
コンパイル使用メモリ 125,680 KB
実行使用メモリ 74,484 KB
最終ジャッジ日時 2025-04-12 18:52:44
合計ジャッジ時間 9,106 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 24
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <iostream>
#include <iomanip>
#include <cassert>
#include <vector>
#include <algorithm>
#include <utility>
#include <numeric>
// #include "Src/Utility/BinarySearch.hpp"
// #include "Src/Sequence/CompressedSequence.hpp"
// #include "Src/Sequence/RunLengthEncoding.hpp"

namespace zawa {

template <class T>
class AdditiveGroup {
public:
    using Element = T;
    static constexpr T identity() noexcept {
        return T{};
    }
    static constexpr T operation(const T& l, const T& r) noexcept {
        return l + r;
    }
    static constexpr T inverse(const T& v) noexcept {
        return -v;
    }
};

} // namespace zawa


#include <cstdint>
#include <cstddef>

namespace zawa {

using i16 = std::int16_t;
using i32 = std::int32_t;
using i64 = std::int64_t;
using i128 = __int128_t;

using u8 = std::uint8_t;
using u16 = std::uint16_t;
using u32 = std::uint32_t;
using u64 = std::uint64_t;

using usize = std::size_t;

} // namespace zawa


#include <concepts>

namespace zawa {

namespace Concept {

template <class T>
concept Monoid = requires {
    typename T::Element;
    { T::identity() } -> std::same_as<typename T::Element>;
    { T::operation(std::declval<typename T::Element>(), std::declval<typename T::Element>()) } -> std::same_as<typename T::Element>;
};

} // namespace

} // namespace zawa

namespace zawa {

namespace Concept {

template <class T>
concept Inversible = requires {
    typename T::Element;
    { T::inverse(std::declval<typename T::Element>()) } -> std::same_as<typename T::Element>;
};

template <class T>
concept Group = Monoid<T> and Inversible<T>;

} // namespace Concept

} // namespace zawa

#include <ostream>
#include <functional>
#include <type_traits>

namespace zawa {

template <Concept::Group Group>
class FenwickTree {
private:
    using Value = typename Group::Element;

    usize n_;
    u32 bitWidth_;
    std::vector<Value> a_, dat_;

    constexpr i32 lsb(i32 x) const noexcept {
        return x & -x;
    }
    
    // a[i] <- a[i] + v
    void addDat(i32 i, const Value& v) {
        assert(0 <= i and i < static_cast<i32>(n_));
        for ( i++ ; i < static_cast<i32>(dat_.size()) ; i += lsb(i)) {
            dat_[i] = Group::operation(dat_[i], v);
        }
    }

    // return a[0] + a[1] + .. + a[i - 1]
    Value product(i32 i) const {
        assert(0 <= i and i <= static_cast<i32>(n_));
        Value res{ Group::identity() };
        for ( ; i > 0 ; i -= lsb(i)) {
            res = Group::operation(res, dat_[i]);
        }
        return res;
    }

public:
    FenwickTree() : n_{}, bitWidth_{}, a_{}, dat_{} {}

    FenwickTree(usize n) : n_{ n }, bitWidth_{ std::__lg(static_cast<u32>(n)) + 1 }, a_(n), dat_(n + 1, Group::identity()) {
        dat_.shrink_to_fit();
    }

    FenwickTree(const std::vector<Value>& a) : n_{ a.size() }, bitWidth_{ std::__lg(static_cast<u32>(a.size())) + 1 }, a_(a), dat_(a.size() + 1, Group::identity()) {
        dat_.shrink_to_fit();  
        for (i32 i{} ; i < static_cast<i32>(n_) ; i++) {
            addDat(i, a[i]);
        }
    }

    // return a[i]
    const Value& get(usize i) const noexcept {
        assert(i < n_);
        return a_[i];
    }

    // return a[i]
    const Value& operator[](usize i) const noexcept {
        assert(i < n_);
        return a_[i];
    }

    usize size() const noexcept {
        return n_;
    }

    // a[i] <- a[i] + v
    void operation(usize i, const Value& v) {
        assert(i < n_);
        addDat(i, v);
        a_[i] = Group::operation(a_[i], v);
    }

    // a[i] <- v
    void set(usize i, const Value& v) {
        assert(i < n_);
        addDat(i, Group::operation(Group::inverse(a_[i]), v));
        a_[i] = v;
    }

    // return a[0] + a[1] + ... + a[r - 1]
    Value prefixProduct(usize r) const {
        assert(r <= n_);
        return product(r);
    }

    // return a[l] + a[l + 1] ... + a[r - 1]
    Value product(usize l, usize r) const {
        assert(l <= r and r <= n_);
        return Group::operation(Group::inverse(product(l)), product(r));
    }

    template <class Function>
    u32 maxRight(usize l, const Function& f) const {
        static_assert(std::is_convertible_v<decltype(f), std::function<bool(Value)>>, "maxRight's argument f must be function bool(T)");
        assert(l < n_);
        Value sum{ Group::inverse(product(l)) }; 
        u32 r{};
        for (u32 bit{ bitWidth_ } ; bit ; ) {
            bit--;
            u32 nxt{ r | (1u << bit) };
            if (nxt < dat_.size() and f(Group::operation(sum, dat_[nxt]))) {
                sum = Group::operation(sum, dat_[nxt]);
                r = std::move(nxt);
            }
        }
        assert(l <= r);
        return r;
    }

    template <class Function>
    u32 minLeft(usize r, const Function& f) const {
        static_assert(std::is_convertible_v<decltype(f), std::function<bool(Value)>>, "minLeft's argument f must be function bool(T)");
        assert(r <= n_);
        Value sum{ product(r) };
        u32 l{};
        for (u32 bit{ bitWidth_ } ; bit ; ) {
            bit--;
            u32 nxt{ l | (1u << bit) };
            if (nxt <= r and not f(Group::operation(Group::inverse(dat_[nxt]), sum))) {
                sum = Group::operation(Group::inverse(dat_[nxt]), sum);
                l = std::move(nxt);
            }
        }
        assert(l <= r);
        return l;
    }

    // debug print
    friend std::ostream& operator<<(std::ostream& os, const FenwickTree& ft) {
        for (u32 i{} ; i <= ft.size() ; i++) {
            os << ft.prefixProduct(i) << (i == ft.size() ? "" : " ");
        }
        return os;
    }
};


} // namespace zawa
using namespace zawa;
// #include "atcoder/modint"
// using mint = atcoder::modint998244353;
int Q, L[200020], R[200020], lpf[1000010];
std::vector<int> x[1000010], ord[1000010];
int main() {
    std::cin.tie(nullptr);
    std::cout.tie(nullptr);
    std::ios::sync_with_stdio(false);
    { // https://zawa-tin.github.io/cp-documentation/Src/Number/LinearSieve.hpp
        std::vector<int> p; 
        for (int i = 2 ; i <= 1000000 ; i++) {
            if (!lpf[i]) {
                lpf[i] = i;
                p.push_back(i);
            }
            for (int v : p) {
                if ((long long)v * i > 1000000) break;
                lpf[v * i] = v;
            }
        }
    }
    x[0].push_back(1);
    for (int i = 2 ; i <= 1000000 ; i++) {
        assert(i % lpf[i] == 0);
        x[i / lpf[i]].push_back(i);
    }
    std::cin >> Q;
    for (int i = 0 ; i < Q ; i++) {
        std::cin >> L[i] >> R[i];
        ord[L[i]].push_back(i);
    }
    FenwickTree<AdditiveGroup<int>> fen(1000001);
    std::vector<int> ans(Q);
    for (int i = 1 ; i <= 1000000 ; i++) {
        for (int idx : x[i - 1]) fen.operation(idx, 1);
        for (int idx : ord[i]) ans[idx] = fen.product(L[idx], R[idx] + 1);
    }
    for (int a : ans) std::cout << a << '\n';
}
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