結果

問題 No.2796 Small Matryoshka
ユーザー iiljjiiljj
提出日時 2024-06-29 14:57:46
言語 C++23
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 372 ms / 2,000 ms
コード長 14,039 bytes
コンパイル時間 2,056 ms
コンパイル使用メモリ 187,344 KB
実行使用メモリ 38,408 KB
最終ジャッジ日時 2024-06-29 14:57:57
合計ジャッジ時間 5,936 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge3
このコードへのチャレンジ
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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
6,812 KB
testcase_01 AC 1 ms
6,940 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 1 ms
6,940 KB
testcase_05 AC 43 ms
9,188 KB
testcase_06 AC 372 ms
38,408 KB
testcase_07 AC 2 ms
6,940 KB
testcase_08 AC 183 ms
19,168 KB
testcase_09 AC 312 ms
30,104 KB
testcase_10 AC 306 ms
29,980 KB
testcase_11 AC 369 ms
33,512 KB
testcase_12 AC 28 ms
7,424 KB
testcase_13 AC 6 ms
6,944 KB
testcase_14 AC 24 ms
6,944 KB
testcase_15 AC 8 ms
6,940 KB
testcase_16 AC 13 ms
6,940 KB
testcase_17 AC 258 ms
27,724 KB
testcase_18 AC 298 ms
31,296 KB
testcase_19 AC 70 ms
11,856 KB
testcase_20 AC 116 ms
15,316 KB
testcase_21 AC 236 ms
27,680 KB
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 # 

/* #region Head */

// #include <bits/stdc++.h>
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert> // assert.h
#include <cmath>   // math.h
#include <cstring>
#include <ctime>
#include <deque>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <memory>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>
using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pll = pair<ll, ll>;
template <class T> using vc = vector<T>;
template <class T> using vvc = vc<vc<T>>;
using vll = vc<ll>;
using vvll = vvc<ll>;
using vld = vc<ld>;
using vvld = vvc<ld>;
using vs = vc<string>;
using vvs = vvc<string>;
template <class T, class U> using um = unordered_map<T, U>;
template <class T> using pq = priority_queue<T>;
template <class T> using pqa = priority_queue<T, vc<T>, greater<T>>;
template <class T> using us = unordered_set<T>;

#define TREP(T, i, m, n) for (T i = (m), i##_len = (T)(n); i < i##_len; ++(i))
#define TREPM(T, i, m, n) for (T i = (m), i##_max = (T)(n); i <= i##_max; ++(i))
#define TREPR(T, i, m, n) for (T i = (m), i##_min = (T)(n); i >= i##_min; --(i))
#define TREPD(T, i, m, n, d) for (T i = (m), i##_len = (T)(n); i < i##_len; i += (d))
#define TREPMD(T, i, m, n, d) for (T i = (m), i##_max = (T)(n); i <= i##_max; i += (d))

#define REP(i, m, n) for (ll i = (m), i##_len = (ll)(n); i < i##_len; ++(i))
#define REPM(i, m, n) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; ++(i))
#define REPR(i, m, n) for (ll i = (m), i##_min = (ll)(n); i >= i##_min; --(i))
#define REPD(i, m, n, d) for (ll i = (m), i##_len = (ll)(n); i < i##_len; i += (d))
#define REPMD(i, m, n, d) for (ll i = (m), i##_max = (ll)(n); i <= i##_max; i += (d))
#define REPI(itr, ds) for (auto itr = ds.begin(); itr != ds.end(); itr++)
#define REPIR(itr, ds) for (auto itr = ds.rbegin(); itr != ds.rend(); itr++)
#define ALL(x) begin(x), end(x)
#define SIZE(x) ((ll)(x).size())
#define ISIZE(x) ((int)(x).size())
#define PERM(c)                                                                                                        \
    sort(ALL(c));                                                                                                      \
    for (bool c##p = 1; c##p; c##p = next_permutation(ALL(c)))
#define UNIQ(v) v.erase(unique(ALL(v)), v.end());
#define CEIL(a, b) (((a) + (b)-1) / (b))

#define endl '\n'

constexpr ll INF = 1'010'000'000'000'000'017LL;
constexpr int IINF = 1'000'000'007LL;
constexpr ll MOD = 1'000'000'007LL; // 1e9 + 7
// constexpr ll MOD = 998244353;
constexpr ld EPS = 1e-12;
constexpr ld PI = 3.14159265358979323846;

// 前方宣言
template <typename T> istream &operator>>(istream &is, vc<T> &vec);
template <typename T> ostream &operator<<(ostream &os, const vc<T> &vec);
template <typename T> ostream &operator>>(ostream &os, const vc<T> &vec);
template <typename T, size_t _Nm> istream &operator>>(istream &is, array<T, _Nm> &arr);
template <typename T, size_t _Nm> ostream &operator<<(ostream &os, const array<T, _Nm> &arr);
template <typename T, size_t _Nm> ostream &operator>>(ostream &os, const array<T, _Nm> &arr);
template <typename T, typename U> istream &operator>>(istream &is, pair<T, U> &pair_var);
template <typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &pair_var);
template <class T> ostream &out_iter(ostream &os, const T &map_var);
template <typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &map_var);
template <typename T, typename U> ostream &operator<<(ostream &os, const um<T, U> &map_var);
template <typename T> ostream &operator<<(ostream &os, const set<T> &set_var);
template <typename T> ostream &operator<<(ostream &os, const us<T> &set_var);
template <typename T> ostream &operator<<(ostream &os, const pq<T> &pq_var);
template <typename T> ostream &operator<<(ostream &os, const queue<T> &queue_var);
template <typename T> ostream &operator<<(ostream &os, const stack<T> &stk_var);

template <typename T> istream &operator>>(istream &is, vc<T> &vec) { // vector 入力
    for (T &x : vec)
        is >> x;
    return is;
}
template <typename T> ostream &operator<<(ostream &os, const vc<T> &vec) { // vector 出力 (for dump)
    os << "{";
    REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "" : ", ");
    os << "}";
    return os;
}
template <typename T> ostream &operator>>(ostream &os, const vc<T> &vec) { // vector 出力 (inline)
    REP(i, 0, SIZE(vec)) os << vec[i] << (i == i_len - 1 ? "\n" : " ");
    return os;
}

template <typename T, size_t _Nm> istream &operator>>(istream &is, array<T, _Nm> &arr) { // array 入力
    REP(i, 0, SIZE(arr)) is >> arr[i];
    return is;
}
template <typename T, size_t _Nm> ostream &operator<<(ostream &os, const array<T, _Nm> &arr) { // array 出力 (for dump)
    os << "{";
    REP(i, 0, SIZE(arr)) os << arr[i] << (i == i_len - 1 ? "" : ", ");
    os << "}";
    return os;
}

template <typename T, typename U> istream &operator>>(istream &is, pair<T, U> &pair_var) { // pair 入力
    is >> pair_var.first >> pair_var.second;
    return is;
}
template <typename T, typename U> ostream &operator<<(ostream &os, const pair<T, U> &pair_var) { // pair 出力
    os << "(" << pair_var.first << ", " << pair_var.second << ")";
    return os;
}

// map, um, set, us 出力
template <class T> ostream &out_iter(ostream &os, const T &map_var) {
    os << "{";
    REPI(itr, map_var) {
        os << *itr;
        auto itrcp = itr;
        if (++itrcp != map_var.end()) os << ", ";
    }
    return os << "}";
}
template <typename T, typename U> ostream &operator<<(ostream &os, const map<T, U> &map_var) {
    return out_iter(os, map_var);
}
template <typename T, typename U> ostream &operator<<(ostream &os, const um<T, U> &map_var) {
    os << "{";
    REPI(itr, map_var) {
        auto [key, value] = *itr;
        os << "(" << key << ", " << value << ")";
        auto itrcp = itr;
        if (++itrcp != map_var.end()) os << ", ";
    }
    os << "}";
    return os;
}
template <typename T> ostream &operator<<(ostream &os, const set<T> &set_var) { return out_iter(os, set_var); }
template <typename T> ostream &operator<<(ostream &os, const us<T> &set_var) { return out_iter(os, set_var); }
template <typename T> ostream &operator<<(ostream &os, const pq<T> &pq_var) {
    pq<T> pq_cp(pq_var);
    os << "{";
    if (!pq_cp.empty()) {
        os << pq_cp.top(), pq_cp.pop();
        while (!pq_cp.empty())
            os << ", " << pq_cp.top(), pq_cp.pop();
    }
    return os << "}";
}

// tuple 出力
template <size_t N = 0, bool end_line = false, typename... Args> ostream &operator<<(ostream &os, tuple<Args...> &a) {
    if constexpr (N < std::tuple_size_v<tuple<Args...>>) {
        os << get<N>(a);
        if constexpr (N + 1 < std::tuple_size_v<tuple<Args...>>) {
            os << ' ';
        } else if constexpr (end_line) {
            os << '\n';
        }
        return operator<< <N + 1, end_line>(os, a);
    }
    return os;
}
template <typename... Args> void print_tuple(tuple<Args...> &a) { operator<< <0, true>(std::cout, a); }

void pprint() { std::cout << endl; }
template <class Head, class... Tail> void pprint(Head &&head, Tail &&...tail) {
    std::cout << head;
    if (sizeof...(Tail) > 0) std::cout << ' ';
    pprint(move(tail)...);
}

// dump
#define DUMPOUT cerr
void dump_func() { DUMPOUT << endl; }
template <class Head, class... Tail> void dump_func(Head &&head, Tail &&...tail) {
    DUMPOUT << head;
    if (sizeof...(Tail) > 0) DUMPOUT << ", ";
    dump_func(move(tail)...);
}

// chmax (更新「される」かもしれない値が前)
template <typename T, typename U, typename Comp = less<>> bool chmax(T &xmax, const U &x, Comp comp = {}) {
    if (comp(xmax, x)) {
        xmax = x;
        return true;
    }
    return false;
}

// chmin (更新「される」かもしれない値が前)
template <typename T, typename U, typename Comp = less<>> bool chmin(T &xmin, const U &x, Comp comp = {}) {
    if (comp(x, xmin)) {
        xmin = x;
        return true;
    }
    return false;
}

// ローカル用
#ifndef ONLINE_JUDGE
#define DEBUG_
#endif

#ifndef MYLOCAL
#undef DEBUG_
#endif

#ifdef DEBUG_
#define DEB
#define dump(...)                                                                                                      \
    DUMPOUT << "  " << string(#__VA_ARGS__) << ": "                                                                    \
            << "[" << to_string(__LINE__) << ":" << __FUNCTION__ << "]" << endl                                        \
            << "    ",                                                                                                 \
        dump_func(__VA_ARGS__)
#else
#define DEB if (false)
#define dump(...)
#endif

#define VAR(type, ...)                                                                                                 \
    type __VA_ARGS__;                                                                                                  \
    assert((std::cin >> __VA_ARGS__));

template <typename T> istream &operator,(istream &is, T &rhs) { return is >> rhs; }
template <typename T> ostream &operator,(ostream &os, const T &rhs) { return os << ' ' << rhs; }

struct AtCoderInitialize {
    static constexpr int IOS_PREC = 15;
    static constexpr bool AUTOFLUSH = false;
    AtCoderInitialize() {
        ios_base::sync_with_stdio(false), std::cin.tie(nullptr), std::cout.tie(nullptr);
        std::cout << fixed << setprecision(IOS_PREC);
        if (AUTOFLUSH) std::cout << unitbuf;
    }
} ATCODER_INITIALIZE;

void Yn(bool p) { std::cout << (p ? "Yes" : "No") << endl; }
void YN(bool p) { std::cout << (p ? "YES" : "NO") << endl; }

template <typename T> constexpr void operator--(vc<T> &v, int) noexcept {
    for (int i = 0; i < ISIZE(v); ++i)
        v[i]--;
}
template <typename T> constexpr void operator++(vc<T> &v, int) noexcept {
    for (int i = 0; i < ISIZE(v); ++i)
        v[i]++;
}

/* #endregion */

// #include <atcoder/all>
// using namespace atcoder;

/* #region CoordCompress1D */

// 1次元座圧
template <typename T = ll> class CoordCompress1D {
    map<T, ll> coord2zipped; // キーが座標値
    vc<T> zipped2coord;      // 各要素が座標値
    ll sz;
    T MAX, MIN;

  public:
    CoordCompress1D() {}
    CoordCompress1D(vc<T> coords, const T &MAX = INF, const T &MIN = -INF) : MAX(MAX), MIN(MIN) {
        sort(ALL(coords));
        UNIQ(coords);
        sz = SIZE(coords);
        zipped2coord = coords;
        REP(i, 0, sz) coord2zipped[coords[i]] = i;
    }
    // 座標の圧縮（コンストラクタに与えた座標限定）
    ll zip(const T &coord) const { return coord2zipped.at(coord); }
    T unzip(const ll &zipped) const { return zipped2coord.at(zipped); }

    // coord 以上の最小の座標値を返す．
    // 戻り値は圧縮前なので注意．入力も圧縮前．
    T coord_geq(const T &coord) const {
        auto it = lower_bound(ALL(zipped2coord), coord);
        if (it != zipped2coord.end()) return *it;
        return MAX;
    }

    // coord より大きいの最小の座標値を返す．
    // 戻り値は圧縮前なので注意．入力も圧縮前．
    T coord_gt(const T &coord) const {
        auto it = upper_bound(ALL(zipped2coord), coord);
        if (it != zipped2coord.end()) return *it;
        return MAX;
    }

    // coord 以下の最小の座標値を返す．
    // 戻り値は圧縮前なので注意．入力も圧縮前．
    T coord_leq(const T &coord) const {
        auto rit = lower_bound(zipped2coord.rbegin(), zipped2coord.rend(), coord,
                               [](ll const lhs, ll const rhs) { return lhs > rhs; });
        if (rit != zipped2coord.rend()) return *rit;
        return MIN;
    }

    // coord 未満の最小の座標値を返す．
    // 戻り値は圧縮前なので注意．入力も圧縮前．
    T coord_lt(const T &coord) const {
        auto rit = upper_bound(zipped2coord.rbegin(), zipped2coord.rend(), coord,
                               [](ll const lhs, ll const rhs) { return lhs > rhs; });
        if (rit != zipped2coord.rend()) return *rit;
        return MIN;
    }

    ll size() const { return sz; }
};

/* #endregion */

/* #region imos_builder */

template <typename T = ll> struct imos_builder {
    int n;
    vc<T> imos;
    vc<T> data;
    bool is_built;

    // コンストラクタ
    imos_builder(const int n, const T init_val = 0) : n(n), imos(n + 1, 0), data(n + 1, 0), is_built(false) {
        imos[0] += init_val;
        imos[n] -= init_val;
    }
    // 半開区間 [l, r) に val を加算する
    void add_range(const int l, const int r, const T &val) {
        assert(not is_built);
        imos[l] += val;
        imos[r] -= val;
    }
    // 構築
    void build() {
        if (is_built) return;

        data[0] = imos[0];
        TREP(int, i, 1, n + 1) data[i] = data[i - 1] + imos[i];

        is_built = true;
    }

    // data[i] 取得
    T get(const int i) const {
        assert(is_built);
        return data.at(i);
    }

    void reset(const T init_val = 0) {
        fill(ALL(imos), 0);
        fill(ALL(data), 0);
        is_built = false;
        imos[0] += init_val;
        imos[n] -= init_val;
    }
};

/* #endregion */

// Problem
void solve() {
    VAR(ll, n);
    vc<pll> r(n);
    cin >> r;

    vll coords(2 * n);
    REP(i, 0, n) {
        coords[2 * i] = r[i].first;
        coords[2 * i + 1] = r[i].second;
    }
    CoordCompress1D<> cc(coords);

    imos_builder<ll> ib(cc.size(), 0);
    REP(i, 0, n) ib.add_range(cc.zip(r[i].first), cc.zip(r[i].second), 1);
    ib.build();

    ll ma = 0;
    REP(i, 0, cc.size()) chmax(ma, ib.get(i) - 1);
    pprint(ma);
}

// entry point
int main() {
    solve();
    return 0;
}
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