結果

問題 No.1557 Binary Variable
ユーザー rniyarniya
提出日時 2021-06-25 22:23:11
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
RE  
実行時間 -
コード長 5,444 bytes
コンパイル時間 2,152 ms
コンパイル使用メモリ 205,516 KB
実行使用メモリ 814,260 KB
最終ジャッジ日時 2024-06-25 08:32:14
合計ジャッジ時間 9,289 ms
ジャッジサーバーID
(参考情報)
judge2 / judge4
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 RE -
testcase_01 RE -
testcase_02 RE -
testcase_03 AC 2 ms
6,940 KB
testcase_04 AC 38 ms
6,944 KB
testcase_05 AC 37 ms
6,940 KB
testcase_06 AC 36 ms
6,940 KB
testcase_07 AC 36 ms
6,944 KB
testcase_08 AC 42 ms
6,944 KB
testcase_09 AC 43 ms
6,944 KB
testcase_10 AC 58 ms
6,944 KB
testcase_11 AC 57 ms
6,940 KB
testcase_12 AC 42 ms
6,940 KB
testcase_13 AC 58 ms
6,940 KB
testcase_14 AC 116 ms
34,500 KB
testcase_15 AC 60 ms
6,940 KB
testcase_16 AC 105 ms
26,488 KB
testcase_17 AC 93 ms
16,400 KB
testcase_18 AC 88 ms
12,832 KB
testcase_19 AC 267 ms
244,104 KB
testcase_20 AC 172 ms
115,684 KB
testcase_21 AC 167 ms
106,656 KB
testcase_22 AC 212 ms
183,820 KB
testcase_23 AC 162 ms
100,928 KB
testcase_24 AC 454 ms
427,096 KB
testcase_25 AC 380 ms
363,060 KB
testcase_26 MLE -
testcase_27 MLE -
testcase_28 -- -
testcase_29 -- -
testcase_30 -- -
testcase_31 -- -
testcase_32 -- -
testcase_33 -- -
testcase_34 -- -
testcase_35 -- -
testcase_36 -- -
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 #

#define LOCAL
#include <bits/stdc++.h>
using namespace std;
#pragma region Macros
typedef long long ll;
typedef __int128_t i128;
typedef unsigned int uint;
typedef unsigned long long ull;
#define ALL(x) (x).begin(), (x).end()

template <typename T> istream& operator>>(istream& is, vector<T>& v) {
    for (T& x : v) is >> x;
    return is;
}
template <typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
    for (int i = 0; i < (int)v.size(); i++) {
        os << v[i] << (i + 1 == (int)v.size() ? "" : " ");
    }
    return os;
}
template <typename T, typename U> ostream& operator<<(ostream& os, const pair<T, U>& p) {
    os << '(' << p.first << ',' << p.second << ')';
    return os;
}
template <typename T, typename U, typename V> ostream& operator<<(ostream& os, const tuple<T, U, V>& t) {
    os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ')';
    return os;
}
template <typename T, typename U, typename V, typename W> ostream& operator<<(ostream& os, const tuple<T, U, V, W>& t) {
    os << '(' << get<0>(t) << ',' << get<1>(t) << ',' << get<2>(t) << ',' << get<3>(t) << ')';
    return os;
}
template <typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& m) {
    os << '{';
    for (auto itr = m.begin(); itr != m.end();) {
        os << '(' << itr->first << ',' << itr->second << ')';
        if (++itr != m.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T, typename U> ostream& operator<<(ostream& os, const unordered_map<T, U>& m) {
    os << '{';
    for (auto itr = m.begin(); itr != m.end();) {
        os << '(' << itr->first << ',' << itr->second << ')';
        if (++itr != m.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const set<T>& s) {
    os << '{';
    for (auto itr = s.begin(); itr != s.end();) {
        os << *itr;
        if (++itr != s.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const multiset<T>& s) {
    os << '{';
    for (auto itr = s.begin(); itr != s.end();) {
        os << *itr;
        if (++itr != s.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const unordered_set<T>& s) {
    os << '{';
    for (auto itr = s.begin(); itr != s.end();) {
        os << *itr;
        if (++itr != s.end()) os << ',';
    }
    os << '}';
    return os;
}
template <typename T> ostream& operator<<(ostream& os, const deque<T>& v) {
    for (int i = 0; i < (int)v.size(); i++) {
        os << v[i] << (i + 1 == (int)v.size() ? "" : " ");
    }
    return os;
}

void debug_out() { cerr << '\n'; }
template <class Head, class... Tail> void debug_out(Head&& head, Tail&&... tail) {
    cerr << head;
    if (sizeof...(Tail) > 0) cerr << ", ";
    debug_out(move(tail)...);
}
#ifdef LOCAL
#define debug(...)                                                                   \
    cerr << " ";                                                                     \
    cerr << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << '\n'; \
    cerr << " ";                                                                     \
    debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif

template <typename T> T gcd(T x, T y) { return y != 0 ? gcd(y, x % y) : x; }
template <typename T> T lcm(T x, T y) { return x / gcd(x, y) * y; }

template <class T1, class T2> inline bool chmin(T1& a, T2 b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template <class T1, class T2> inline bool chmax(T1& a, T2 b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}
#pragma endregion

/**
 * @brief Binary Indexed Tree
 * @docs docs/datastructure/BinaryIndexedTree.md
 */
template <typename T> class BinaryIndexedTree {
    T sum(int i) {
        T res = T();
        for (; i > 0; i -= (i & -i)) res += dat[i];
        return res;
    }

public:
    int n;
    vector<T> dat;
    BinaryIndexedTree(int n_) : n(n_ + 1), dat(n + 1, 0) {}
    void add(int i, const T& x) {
        for (++i; i <= n; i += (i & -i)) dat[i] += x;
    }
    T query(int l, int r) { return sum(r) - sum(l); }
    int lower_bound(T x) const {
        if (x <= 0) return 0;
        int pos = 0, k = 1;
        while (k < n) k <<= 1;
        for (; k > 0; k >>= 1) {
            if (pos + k <= n && dat[pos + k] < x) {
                x -= dat[pos + k];
                pos += k;
            }
        }
        return pos;
    }
    int upper_bound(T x) const { return lower_bound(x + 1); }
    T operator[](int i) { return query(i, i + 1); }
};

const int INF = 1e9;
const long long IINF = 1e18;
const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};
const char dir[4] = {'D', 'R', 'U', 'L'};
const long long MOD = 1000000007;
// const long long MOD = 998244353;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N, M;
    cin >> N >> M;
    vector<vector<int>> check(N);
    for (int i = 0; i < M; i++) {
        int L, R;
        cin >> L >> R;
        check[--R].emplace_back(--L);
    }

    BinaryIndexedTree<int> BIT(N);
    for (int r = 0; r < N; r++) {
        for (int& l : check[r]) {
            if (BIT.query(l, r + 1) == 0) {
                BIT.add(r, 1);
            }
        }
    }

    int ans = N - BIT.query(0, N);
    cout << ans << '\n';
    return 0;
}
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