結果

問題 No.957 植林
ユーザー t98slidert98slider
提出日時 2023-11-13 23:40:05
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 312 ms / 2,000 ms
コード長 5,231 bytes
コンパイル時間 2,302 ms
コンパイル使用メモリ 215,368 KB
実行使用メモリ 9,280 KB
最終ジャッジ日時 2024-09-26 03:25:59
合計ジャッジ時間 10,609 ms
ジャッジサーバーID
(参考情報)
judge3 / 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 AC 2 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 21 ms
8,512 KB
testcase_04 AC 19 ms
8,388 KB
testcase_05 AC 23 ms
8,528 KB
testcase_06 AC 23 ms
8,900 KB
testcase_07 AC 22 ms
8,528 KB
testcase_08 AC 17 ms
8,604 KB
testcase_09 AC 17 ms
8,600 KB
testcase_10 AC 18 ms
8,668 KB
testcase_11 AC 18 ms
8,608 KB
testcase_12 AC 16 ms
8,596 KB
testcase_13 AC 14 ms
7,624 KB
testcase_14 AC 18 ms
9,020 KB
testcase_15 AC 16 ms
8,512 KB
testcase_16 AC 14 ms
7,744 KB
testcase_17 AC 16 ms
8,384 KB
testcase_18 AC 216 ms
8,616 KB
testcase_19 AC 230 ms
8,736 KB
testcase_20 AC 245 ms
8,748 KB
testcase_21 AC 242 ms
8,756 KB
testcase_22 AC 266 ms
8,876 KB
testcase_23 AC 286 ms
9,012 KB
testcase_24 AC 282 ms
9,264 KB
testcase_25 AC 304 ms
9,144 KB
testcase_26 AC 304 ms
9,148 KB
testcase_27 AC 302 ms
9,148 KB
testcase_28 AC 302 ms
9,276 KB
testcase_29 AC 310 ms
9,276 KB
testcase_30 AC 312 ms
9,148 KB
testcase_31 AC 219 ms
8,620 KB
testcase_32 AC 225 ms
8,748 KB
testcase_33 AC 252 ms
8,748 KB
testcase_34 AC 242 ms
8,884 KB
testcase_35 AC 272 ms
9,132 KB
testcase_36 AC 290 ms
9,016 KB
testcase_37 AC 287 ms
9,268 KB
testcase_38 AC 301 ms
9,276 KB
testcase_39 AC 310 ms
9,148 KB
testcase_40 AC 311 ms
9,152 KB
testcase_41 AC 14 ms
9,280 KB
testcase_42 AC 14 ms
9,196 KB
testcase_43 AC 19 ms
9,272 KB
testcase_44 AC 20 ms
9,152 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 #

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

template<class T> istream& operator >> (istream& is, vector<T>& vec) {
    for(T& x : vec) is >> x;
    return is;
}

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 h, w;
    cin >> h >> w;
    vector<vector<int>> G(h, vector<int>(w));
    vector<int> R(h), C(w);
    cin >> G >> R >> C;
    mf_graph<ll> g(h + w + 2);
    int src = h + w, sink = src + 1;
    ll ans = 0;
    for(int y = 0; y < h; y++){
        ll s = accumulate(G[y].begin(), G[y].end(), 0ll);
        ll mn = min((ll)(R[y]), s);
        ans += R[y] - mn;
        g.add_edge(src, y, s - mn);
        for(int x = 0; x < w; x++){
            g.add_edge(y, x + h, G[y][x]);
        }
    }
    for(int x = 0; x < w; x++){
        g.add_edge(x + h, sink, C[x]);
        ans += C[x];
    }
    ans -= g.flow(src, sink);
    cout << ans << '\n';
}
0