結果

問題 No.957 植林
ユーザー 👑 hitonanodehitonanode
提出日時 2021-08-25 21:47:12
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 220 ms / 2,000 ms
コード長 4,424 bytes
コンパイル時間 1,184 ms
コンパイル使用メモリ 97,392 KB
実行使用メモリ 9,276 KB
最終ジャッジ日時 2024-04-28 13:13:49
合計ジャッジ時間 8,984 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 2 ms
6,812 KB
testcase_01 AC 2 ms
6,944 KB
testcase_02 AC 2 ms
6,944 KB
testcase_03 AC 62 ms
8,648 KB
testcase_04 AC 64 ms
8,388 KB
testcase_05 AC 62 ms
8,776 KB
testcase_06 AC 77 ms
8,896 KB
testcase_07 AC 56 ms
8,532 KB
testcase_08 AC 21 ms
8,736 KB
testcase_09 AC 20 ms
8,732 KB
testcase_10 AC 22 ms
8,800 KB
testcase_11 AC 24 ms
8,604 KB
testcase_12 AC 22 ms
8,724 KB
testcase_13 AC 16 ms
7,624 KB
testcase_14 AC 19 ms
8,892 KB
testcase_15 AC 18 ms
8,508 KB
testcase_16 AC 16 ms
7,740 KB
testcase_17 AC 16 ms
8,384 KB
testcase_18 AC 166 ms
8,616 KB
testcase_19 AC 172 ms
8,616 KB
testcase_20 AC 172 ms
8,876 KB
testcase_21 AC 182 ms
8,880 KB
testcase_22 AC 186 ms
9,000 KB
testcase_23 AC 198 ms
9,140 KB
testcase_24 AC 201 ms
9,248 KB
testcase_25 AC 220 ms
9,148 KB
testcase_26 AC 213 ms
9,144 KB
testcase_27 AC 217 ms
9,276 KB
testcase_28 AC 215 ms
9,272 KB
testcase_29 AC 215 ms
9,272 KB
testcase_30 AC 213 ms
9,276 KB
testcase_31 AC 160 ms
8,624 KB
testcase_32 AC 170 ms
8,748 KB
testcase_33 AC 177 ms
8,876 KB
testcase_34 AC 186 ms
8,884 KB
testcase_35 AC 190 ms
8,896 KB
testcase_36 AC 195 ms
9,140 KB
testcase_37 AC 210 ms
9,140 KB
testcase_38 AC 216 ms
9,260 KB
testcase_39 AC 212 ms
9,276 KB
testcase_40 AC 217 ms
9,140 KB
testcase_41 AC 14 ms
9,276 KB
testcase_42 AC 14 ms
9,272 KB
testcase_43 AC 20 ms
9,152 KB
testcase_44 AC 55 ms
9,276 KB
testcase_45 AC 2 ms
6,940 KB
testcase_46 AC 2 ms
6,940 KB
testcase_47 AC 1 ms
6,944 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> struct mf_pushrelabel {
    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;
    std::vector<std::vector<int>> h2v;
    int max_height;
    void activate(int i) {
        h2v[dist[i]].push_back(i);
        if (dist[i] > max_height) max_height = dist[i];
    }
    void global_labeling(int t) {
        dist.assign(_n, _n), dist[t] = 0;
        static std::vector<int> q;
        q = {t};
        int qh = 0;
        h2v.assign(_n * 2, {});
        max_height = -1;
        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;
        h2v.assign(_n * 2, {});
        max_height = -1;
        for (auto &e : g[s]) push(s, e);
        global_labeling(t);
        int tick = _n;
        while (max_height >= 0) {
            if (h2v[max_height].empty()) {
                max_height--;
                continue;
            }
            int i = h2v[max_height].back();
            h2v[max_height].pop_back();
            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_labeling(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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