結果

問題 No.2422 regisys?
ユーザー t98slidert98slider
提出日時 2023-08-12 15:13:33
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
TLE  
実行時間 -
コード長 5,577 bytes
コンパイル時間 2,213 ms
コンパイル使用メモリ 184,992 KB
実行使用メモリ 67,592 KB
最終ジャッジ日時 2024-04-30 08:26:11
合計ジャッジ時間 14,321 ms
ジャッジサーバーID
(参考情報)
judge3 / 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 2 ms
13,888 KB
testcase_01 AC 2 ms
6,940 KB
testcase_02 AC 2 ms
6,940 KB
testcase_03 AC 2 ms
6,944 KB
testcase_04 AC 2 ms
6,944 KB
testcase_05 AC 2 ms
6,944 KB
testcase_06 AC 3 ms
6,940 KB
testcase_07 AC 2 ms
6,944 KB
testcase_08 AC 2 ms
6,940 KB
testcase_09 AC 2 ms
6,944 KB
testcase_10 AC 2 ms
6,944 KB
testcase_11 AC 2 ms
6,944 KB
testcase_12 AC 2 ms
6,940 KB
testcase_13 AC 2 ms
6,940 KB
testcase_14 AC 2 ms
6,940 KB
testcase_15 AC 2 ms
6,940 KB
testcase_16 AC 2 ms
6,940 KB
testcase_17 AC 2 ms
6,944 KB
testcase_18 AC 2 ms
6,940 KB
testcase_19 AC 2 ms
6,944 KB
testcase_20 AC 2 ms
6,940 KB
testcase_21 AC 2 ms
6,940 KB
testcase_22 AC 2 ms
6,944 KB
testcase_23 AC 2 ms
6,944 KB
testcase_24 AC 2 ms
6,940 KB
testcase_25 AC 2 ms
6,940 KB
testcase_26 AC 2 ms
6,944 KB
testcase_27 AC 2 ms
6,940 KB
testcase_28 AC 2 ms
6,940 KB
testcase_29 AC 2 ms
6,944 KB
testcase_30 AC 2 ms
6,940 KB
testcase_31 AC 445 ms
32,884 KB
testcase_32 AC 462 ms
33,084 KB
testcase_33 AC 280 ms
31,936 KB
testcase_34 AC 114 ms
13,780 KB
testcase_35 AC 331 ms
38,660 KB
testcase_36 AC 275 ms
23,380 KB
testcase_37 AC 674 ms
36,712 KB
testcase_38 AC 172 ms
22,704 KB
testcase_39 AC 112 ms
14,660 KB
testcase_40 AC 184 ms
21,004 KB
testcase_41 AC 161 ms
17,764 KB
testcase_42 AC 586 ms
65,120 KB
testcase_43 AC 724 ms
29,540 KB
testcase_44 AC 767 ms
67,592 KB
testcase_45 AC 604 ms
58,928 KB
testcase_46 AC 792 ms
67,096 KB
testcase_47 TLE -
testcase_48 -- -
testcase_49 -- -
testcase_50 -- -
testcase_51 -- -
testcase_52 -- -
testcase_53 -- -
testcase_54 -- -
testcase_55 -- -
testcase_56 -- -
testcase_57 -- -
testcase_58 -- -
testcase_59 -- -
testcase_60 -- -
testcase_61 -- -
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ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

template <class T> struct simple_queue {
    std::vector<T> payload;
    int pos = 0;
    void reserve(int n) { payload.reserve(n); }
    int size() const { return int(payload.size()) - pos; }
    bool empty() const { return pos == int(payload.size()); }
    void push(const T& t) { payload.push_back(t); }
    T& front() { return payload[pos]; }
    void clear() {
        payload.clear();
        pos = 0;
    }
    void pop() { pos++; }
};

template <class Cap> struct mf_graph {
  public:
    mf_graph() : _n(0) {}
    mf_graph(int n) : _n(n), g(n) {}

    int add_edge(int from, int to, Cap cap) {
        assert(0 <= from && from < _n);
        assert(0 <= to && to < _n);
        assert(0 <= cap);
        int m = int(pos.size());
        pos.push_back({from, int(g[from].size())});
        g[from].push_back(_edge{to, int(g[to].size()), cap});
        g[to].push_back(_edge{from, int(g[from].size()) - 1, 0});
        return m;
    }

    struct edge {
        int from, to;
        Cap cap, flow;
    };

    edge get_edge(int i) {
        int m = int(pos.size());
        assert(0 <= i && i < m);
        auto _e = g[pos[i].first][pos[i].second];
        auto _re = g[_e.to][_e.rev];
        return edge{pos[i].first, _e.to, _e.cap + _re.cap, _re.cap};
    }
    std::vector<edge> edges() {
        int m = int(pos.size());
        std::vector<edge> result;
        for (int i = 0; i < m; i++) {
            result.push_back(get_edge(i));
        }
        return result;
    }
    void change_edge(int i, Cap new_cap, Cap new_flow) {
        int m = int(pos.size());
        assert(0 <= i && i < m);
        assert(0 <= new_flow && new_flow <= new_cap);
        auto& _e = g[pos[i].first][pos[i].second];
        auto& _re = g[_e.to][_e.rev];
        _e.cap = new_cap - new_flow;
        _re.cap = new_flow;
    }

    Cap flow(int s, int t) {
        return flow(s, t, std::numeric_limits<Cap>::max());
    }
    Cap flow(int s, int t, Cap flow_limit) {
        assert(0 <= s && s < _n);
        assert(0 <= t && t < _n);

        std::vector<int> level(_n), iter(_n);
        simple_queue<int> que;

        auto bfs = [&]() {
            std::fill(level.begin(), level.end(), -1);
            level[s] = 0;
            que.clear();
            que.push(s);
            while (!que.empty()) {
                int v = que.front();
                que.pop();
                for (auto e : g[v]) {
                    if (e.cap == 0 || level[e.to] >= 0) continue;
                    level[e.to] = level[v] + 1;
                    if (e.to == t) return;
                    que.push(e.to);
                }
            }
        };
        auto dfs = [&](auto self, int v, Cap up) {
            if (v == s) return up;
            Cap res = 0;
            int level_v = level[v];
            for (int& i = iter[v]; i < int(g[v].size()); i++) {
                _edge& e = g[v][i];
                if (level_v <= level[e.to] || g[e.to][e.rev].cap == 0) continue;
                Cap d =
                    self(self, e.to, std::min(up - res, g[e.to][e.rev].cap));
                if (d <= 0) continue;
                g[v][i].cap += d;
                g[e.to][e.rev].cap -= d;
                res += d;
                if (res == up) break;
            }
            return res;
        };

        Cap flow = 0;
        while (flow < flow_limit) {
            bfs();
            if (level[t] == -1) break;
            std::fill(iter.begin(), iter.end(), 0);
            while (flow < flow_limit) {
                Cap f = dfs(dfs, t, flow_limit - flow);
                if (!f) break;
                flow += f;
            }
        }
        return flow;
    }

    std::vector<bool> min_cut(int s) {
        std::vector<bool> visited(_n);
        simple_queue<int> que;
        que.push(s);
        while (!que.empty()) {
            int p = que.front();
            que.pop();
            visited[p] = true;
            for (auto e : g[p]) {
                if (e.cap && !visited[e.to]) {
                    visited[e.to] = true;
                    que.push(e.to);
                }
            }
        }
        return visited;
    }

  private:
    int _n;
    struct _edge {
        int to, rev;
        Cap cap;
    };
    std::vector<std::pair<int, int>> pos;
    std::vector<std::vector<_edge>> g;
};

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, m, v;
    cin >> n >> m;
    vector<pair<int,int>> a(n), b(n);
    for(int i = 0; i < n; i++){
        cin >> v;
        a[i] = {v, i};
    }
    for(int i = 0; i < n; i++){
        cin >> v;
        b[i] = {v, i};
    }
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    mf_graph<int> g(3 * n + 2);
    int s = 3 * n, t = s + 1;
    for(int i = 0; i < n; i++){
        g.add_edge(i, 2 * n + i, 1);
        g.add_edge(n + i, 2 * n + i, 1);
        g.add_edge(2 * n + i, t, 1);
        if(i + 1 < n){
            g.add_edge(a[i + 1].second, a[i].second, n);
            g.add_edge(b[i + 1].second + n, b[i].second + n, n);
        }
    }
    for(int i = 0; i < m; i++){
        int c;
        cin >> c >> v;
        if(c == 0){
            int id = upper_bound(a.begin(), a.end(), make_pair(v, n + 1)) - a.begin();
            if(id >= 1) g.add_edge(s, a[id - 1].second, 1);
        }else{
            int id = upper_bound(b.begin(), b.end(), make_pair(v, n + 1)) - b.begin();
            if(id >= 1) g.add_edge(s, b[id - 1].second + n, 1);
        }
    }
    cout << n - g.flow(s, t) << '\n';
}
0