結果

問題 No.957 植林
ユーザー 👑 hitonanodehitonanode
提出日時 2021-08-26 21:52:22
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 180 ms / 2,000 ms
コード長 4,944 bytes
コンパイル時間 1,173 ms
コンパイル使用メモリ 95,924 KB
実行使用メモリ 9,276 KB
最終ジャッジ日時 2024-04-29 15:20:01
合計ジャッジ時間 6,344 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
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
5,248 KB
testcase_01 AC 1 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 45 ms
8,516 KB
testcase_04 AC 69 ms
8,212 KB
testcase_05 AC 35 ms
8,520 KB
testcase_06 AC 180 ms
8,772 KB
testcase_07 AC 42 ms
8,408 KB
testcase_08 AC 21 ms
8,476 KB
testcase_09 AC 20 ms
8,608 KB
testcase_10 AC 22 ms
8,800 KB
testcase_11 AC 22 ms
8,732 KB
testcase_12 AC 23 ms
8,464 KB
testcase_13 AC 17 ms
7,620 KB
testcase_14 AC 21 ms
9,016 KB
testcase_15 AC 19 ms
8,632 KB
testcase_16 AC 17 ms
7,616 KB
testcase_17 AC 19 ms
8,256 KB
testcase_18 AC 87 ms
8,616 KB
testcase_19 AC 91 ms
8,616 KB
testcase_20 AC 95 ms
8,744 KB
testcase_21 AC 97 ms
8,756 KB
testcase_22 AC 102 ms
9,004 KB
testcase_23 AC 107 ms
9,012 KB
testcase_24 AC 112 ms
9,140 KB
testcase_25 AC 116 ms
9,148 KB
testcase_26 AC 116 ms
9,144 KB
testcase_27 AC 113 ms
9,144 KB
testcase_28 AC 114 ms
9,148 KB
testcase_29 AC 114 ms
9,148 KB
testcase_30 AC 111 ms
9,152 KB
testcase_31 AC 87 ms
8,492 KB
testcase_32 AC 90 ms
8,684 KB
testcase_33 AC 94 ms
8,744 KB
testcase_34 AC 98 ms
8,756 KB
testcase_35 AC 102 ms
8,876 KB
testcase_36 AC 106 ms
9,008 KB
testcase_37 AC 110 ms
9,140 KB
testcase_38 AC 114 ms
9,144 KB
testcase_39 AC 114 ms
9,276 KB
testcase_40 AC 113 ms
9,144 KB
testcase_41 AC 13 ms
9,148 KB
testcase_42 AC 14 ms
9,152 KB
testcase_43 AC 21 ms
9,144 KB
testcase_44 AC 22 ms
9,276 KB
testcase_45 AC 2 ms
5,376 KB
testcase_46 AC 2 ms
5,376 KB
testcase_47 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 #

#line 1 "combinatorial_opt/test/maxflow.pushrelabel.yuki957.test.cpp"
#define PROBLEM "https://yukicoder.me/problems/no/957"
#line 2 "combinatorial_opt/maxflow_pushrelabel.hpp"
#include <cassert>
#include <limits>
#include <utility>
#include <vector>

// Maxflow (push-relabel, highest-label)
// Complexity: O(N^2 M^(1/2))
template <class Cap, Cap INF = std::numeric_limits<Cap>::max() / 2, bool UseGlobalRelabeling = false>
struct mf_pushrelabel {
    struct pque_ {
        std::vector<std::pair<int, int>> even_, odd_;
        pque_() : even_(0), odd_(0) {}
        void clear() { even_.clear(), odd_.clear(); }
        bool empty() const { return even_.empty() and odd_.empty(); }
        void push(int i, int h) {
            if (even_.size() and even_.back().second - 1 > h) throw;
            if (odd_.size() and odd_.back().second - 1 > h) throw;
            (h & 1 ? odd_ : even_).emplace_back(i, h);
        }
        int pop() {
            int ret;
            if (even_.empty() or (odd_.size() and odd_.back().second > even_.back().second)) {
                return ret = odd_.back().first, odd_.pop_back(), ret;
            } else {
                return ret = even_.back().first, even_.pop_back(), ret;
            }
        }
    } pque;
    int _n;
    struct _edge {
        int to, rev;
        Cap cap;
    };
    std::vector<std::vector<_edge>> g;
    std::vector<std::pair<int, int>> pos;
    mf_pushrelabel(int n) : _n(n), g(n) { static_assert(INF > 0, "INF must be positive."); }
    int add_edge(int from, int to, Cap cap) {
        assert(0 <= from and from < _n);
        assert(0 <= to and to < _n);
        assert(0 <= cap);
        int m = int(pos.size());
        pos.emplace_back(from, int(g[from].size()));
        int from_id = g[from].size(), to_id = g[to].size() + (from == to);
        g[from].push_back({to, to_id, cap});
        g[to].push_back({from, from_id, Cap(0)});
        return m;
    }

    std::vector<int> dist;
    std::vector<Cap> excess;
    void activate(int i) { pque.push(i, dist[i]); }
    void global_relabeling(int t) {
        if (!UseGlobalRelabeling) return;
        dist.assign(_n, _n), dist[t] = 0;
        static std::vector<int> q;
        q = {t};
        int qh = 0;
        pque.clear();
        while (qh < int(q.size())) {
            int now = q[qh++];
            if (excess[now] > 0) activate(now);
            for (const auto &e : g[now]) {
                if (g[e.to][e.rev].cap and dist[e.to] == _n) {
                    dist[e.to] = dist[now] + 1;
                    q.push_back(e.to);
                }
            }
        }
    }
    Cap flow(const int &s, const int &t) {
        assert(0 <= s and s < _n);
        assert(0 <= t and t < _n);
        assert(s != t);
        excess.assign(_n, 0);
        excess[s] = INF, excess[t] = -INF;
        dist.assign(_n, 0);
        dist[s] = _n;
        pque.clear();
        for (auto &e : g[s]) push(s, e);
        global_relabeling(t);
        int tick = _n;
        while (!pque.empty()) {
            int i = pque.pop();
            int dnxt = _n * 2 - 1;
            for (auto &e : g[i]) {
                if (!e.cap) continue;
                if (dist[e.to] == dist[i] - 1) {
                    push(i, e);
                    if (excess[i] == 0) break;
                } else {
                    if (dist[e.to] + 1 < dnxt) dnxt = dist[e.to] + 1;
                }
            }
            if (excess[i] > 0) {
                dist[i] = dnxt;
                activate(i);
            }
            if (--tick == 0) tick = _n, global_relabeling(t);
        }
        return excess[t] + INF;
    }

    void push(int i, _edge &e) {
        Cap delta = e.cap < excess[i] ? e.cap : excess[i];
        excess[i] -= delta, e.cap -= delta;
        excess[e.to] += delta, g[e.to][e.rev].cap += delta;
        if (excess[e.to] > 0 and excess[e.to] <= delta) activate(e.to);
    }
};
#line 3 "combinatorial_opt/test/maxflow.pushrelabel.yuki957.test.cpp"
#include <algorithm>
#include <iostream>
#include <numeric>
using namespace std;

int main() {
    cin.tie(nullptr), ios::sync_with_stdio(false);
    int H, W;
    cin >> H >> W;
    vector<vector<int>> G(H, vector<int>(W));
    for (auto &v : G) {
        for (auto &x : v) cin >> x;
    }
    vector<int> R(H), C(W);
    for (auto &x : R) cin >> x;
    for (auto &x : C) cin >> x;
    long long tot = accumulate(R.begin(), R.end(), 0LL) + accumulate(C.begin(), C.end(), 0LL);

    long long f1 = 0;

    int Z = 1 + H + W;
    mf_pushrelabel<long long> g(Z + 1);

    for (int i = 0; i < H; i++) {
        auto gtot = accumulate(G[i].begin(), G[i].end(), 0LL);
        auto f0 = min<long long>(gtot, R[i]);
        f1 += f0;
        g.add_edge(0, i + 1, gtot - f0);
        for (int j = 0; j < W; j++) g.add_edge(i + 1, H + 1 + j, G[i][j]);
    }
    for (int j = 0; j < W; j++) g.add_edge(H + 1 + j, Z, C[j]);
    cout << tot - f1 - g.flow(0, Z) << '\n';
}
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