結果

問題 No.1557 Binary Variable
ユーザー scol_kpscol_kp
提出日時 2021-06-25 21:40:51
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 64 ms / 2,000 ms
コード長 3,539 bytes
コンパイル時間 2,297 ms
コンパイル使用メモリ 209,336 KB
実行使用メモリ 6,528 KB
最終ジャッジ日時 2024-06-25 08:18:43
合計ジャッジ時間 5,728 ms
ジャッジサーバーID
(参考情報)
judge4 / judge2
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 40 ms
6,528 KB
testcase_01 AC 44 ms
6,400 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 41 ms
6,400 KB
testcase_05 AC 39 ms
6,400 KB
testcase_06 AC 39 ms
6,272 KB
testcase_07 AC 39 ms
6,272 KB
testcase_08 AC 45 ms
6,400 KB
testcase_09 AC 46 ms
6,400 KB
testcase_10 AC 52 ms
6,400 KB
testcase_11 AC 49 ms
6,400 KB
testcase_12 AC 44 ms
6,528 KB
testcase_13 AC 53 ms
6,400 KB
testcase_14 AC 55 ms
6,272 KB
testcase_15 AC 51 ms
6,272 KB
testcase_16 AC 55 ms
6,400 KB
testcase_17 AC 54 ms
6,400 KB
testcase_18 AC 55 ms
6,272 KB
testcase_19 AC 58 ms
6,400 KB
testcase_20 AC 58 ms
6,400 KB
testcase_21 AC 58 ms
6,400 KB
testcase_22 AC 59 ms
6,400 KB
testcase_23 AC 59 ms
6,400 KB
testcase_24 AC 60 ms
6,400 KB
testcase_25 AC 60 ms
6,400 KB
testcase_26 AC 60 ms
6,400 KB
testcase_27 AC 61 ms
6,400 KB
testcase_28 AC 62 ms
6,272 KB
testcase_29 AC 64 ms
6,400 KB
testcase_30 AC 63 ms
6,400 KB
testcase_31 AC 62 ms
6,400 KB
testcase_32 AC 63 ms
6,272 KB
testcase_33 AC 59 ms
6,400 KB
testcase_34 AC 2 ms
5,376 KB
testcase_35 AC 2 ms
5,376 KB
testcase_36 AC 2 ms
5,376 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 #

#include <bits/stdc++.h>
#define FASTIO
using namespace std;

using ll = long long;
using Vi = std::vector<int>;
using Vl = std::vector<ll>;
using Pii = std::pair<int, int>;
using Pll = std::pair<ll, ll>;

constexpr int I_INF = std::numeric_limits<int>::max();
constexpr ll L_INF = std::numeric_limits<ll>::max();

template <typename T1, typename T2>
inline bool chmin(T1& a, const T2& b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template <typename T1, typename T2>
inline bool chmax(T1& a, const T2& b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

template <std::ostream& os = std::cout>
class Prints {
private:
    class __Prints {
    public:
        __Prints(const char* sep, const char* term) : sep(sep), term(term) {}
        template <class... Args>
#if __cplusplus >= 201703L
        auto operator()(const Args&... args) const -> decltype((os << ... << std::declval<Args>()), void()) {
#else
        void operator()(const Args&... args) const {
#endif
            print(args...);
        }
        template <typename T>
#if __cplusplus >= 201703L
        auto pvec(const T& vec, size_t sz) const -> decltype(os << std::declval<decltype(std::declval<T>()[0])>(), void()) {
#else
        void pvec(const T& vec, size_t sz) const {
#endif
            for (size_t i = 0; i < sz; i++)
                os << vec[i] << (i == sz - 1 ? term : sep);
        }
        template <typename T>
#if __cplusplus >= 201703L
        auto pmat(const T& mat, size_t h, size_t w) const -> decltype(os << std::declval<decltype(std::declval<T>()[0][0])>(), void()) {
#else
        void pmat(const T& mat, size_t h, size_t w) const {
#endif
            for (size_t i = 0; i < h; i++)
                for (size_t j = 0; j < w; j++)
                    os << mat[i][j] << (j == w - 1 ? term : sep);
        }

    private:
        const char *sep, *term;
        void print() const { os << term; }
        void print_rest() const { os << term; }
        template <class T, class... Tail>
        void print(const T& head, const Tail&... tail) const { os << head, print_rest(tail...); }
        template <class T, class... Tail>
        void print_rest(const T& head, const Tail&... tail) const { os << sep << head, print_rest(tail...); }
    };

public:
    Prints() {}
    __Prints operator()(const char* sep = " ", const char* term = "\n") const { return __Prints(sep, term); }
};

Prints<> prints;
Prints<std::cerr> prints_err;

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

void solve() {
    ll N, M;
    cin >> N >> M;
    vector<Pll> LR(M);
    for (ll i = 0; i < M; i++) {
        ll l, r;
        cin >> l >> r;
        LR[i] = {l, r};
    }
    sort(LR.begin(), LR.end(), [](Pll& l, Pll& r) { return l.second < r.second; });
    ll cnt = 0;
    ll cur = -1;
    for (ll i = 0; i < M; i++) {
        auto [l, r] = LR[i];
        if (l > cur) {
            ++cnt;
            cur = r;
        }
    }
    prints()(N - cnt);
}

//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

int main() {
#ifdef FASTIO
    std::cin.tie(nullptr), std::cout.tie(nullptr);
    std::ios::sync_with_stdio(false);
#endif
#ifdef FILEINPUT
    std::ifstream ifs("./in_out/input.txt");
    std::cin.rdbuf(ifs.rdbuf());
#endif
#ifdef FILEOUTPUT
    std::ofstream ofs("./in_out/output.txt");
    std::cout.rdbuf(ofs.rdbuf());
#endif
    std::cout << std::setprecision(18) << std::fixed;
    solve();
    std::cout << std::flush;
    return 0;
}
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