#761642 (C++17) No.654 Air E869120

提出ソース

結果

問題	No.654 Air E869120
ユーザー	masutech16
提出日時	2022-05-17 00:23:40
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	8 ms / 2,000 ms
コード長	9,488 bytes
コンパイル時間	3,008 ms
コンパイル使用メモリ	231,860 KB
実行使用メモリ	5,376 KB
最終ジャッジ日時	2024-09-14 17:48:25
合計ジャッジ時間	4,323 ms
ジャッジサーバーID （参考情報）	judge6 / judge4

このコードへのチャレンジ
（要ログイン）

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 5,248 KB
testcase_02	AC	2 ms 5,376 KB
testcase_03	AC	2 ms 5,376 KB
testcase_04	AC	2 ms 5,376 KB
testcase_05	AC	2 ms 5,376 KB
testcase_06	AC	2 ms 5,376 KB
testcase_07	AC	2 ms 5,376 KB
testcase_08	AC	2 ms 5,376 KB
testcase_09	AC	2 ms 5,376 KB
testcase_10	AC	6 ms 5,376 KB
testcase_11	AC	5 ms 5,376 KB
testcase_12	AC	6 ms 5,376 KB
testcase_13	AC	6 ms 5,376 KB
testcase_14	AC	6 ms 5,376 KB
testcase_15	AC	6 ms 5,376 KB
testcase_16	AC	7 ms 5,376 KB
testcase_17	AC	8 ms 5,376 KB
testcase_18	AC	7 ms 5,376 KB
testcase_19	AC	8 ms 5,376 KB
testcase_20	AC	5 ms 5,376 KB
testcase_21	AC	5 ms 5,376 KB
testcase_22	AC	4 ms 5,376 KB
testcase_23	AC	5 ms 5,376 KB
testcase_24	AC	5 ms 5,376 KB
testcase_25	AC	4 ms 5,376 KB
testcase_26	AC	4 ms 5,376 KB
testcase_27	AC	4 ms 5,376 KB
testcase_28	AC	4 ms 5,376 KB
testcase_29	AC	4 ms 5,376 KB
testcase_30	AC	4 ms 5,376 KB
testcase_31	AC	4 ms 5,376 KB
testcase_32	AC	4 ms 5,376 KB
testcase_33	AC	4 ms 5,376 KB
testcase_34	AC	4 ms 5,376 KB
testcase_35	AC	2 ms 5,376 KB
testcase_36	AC	2 ms 5,376 KB
testcase_37	AC	2 ms 5,376 KB
testcase_38	AC	2 ms 5,376 KB
testcase_39	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

raw source code

#line 1 "main.cpp"
#include <bits/stdc++.h>

#line 1 "/workspaces/compro/lib/ac-library/atcoder/maxflow.hpp"



#line 9 "/workspaces/compro/lib/ac-library/atcoder/maxflow.hpp"

#line 1 "/workspaces/compro/lib/ac-library/atcoder/internal_queue.hpp"



#line 5 "/workspaces/compro/lib/ac-library/atcoder/internal_queue.hpp"

namespace atcoder {

namespace internal {

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++; }
};

}  // namespace internal

}  // namespace atcoder


#line 11 "/workspaces/compro/lib/ac-library/atcoder/maxflow.hpp"

namespace atcoder {

template <class Cap> struct mf_graph {
  public:
    mf_graph() : _n(0) {}
    explicit 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())});
        int from_id = int(g[from].size());
        int to_id = int(g[to].size());
        if (from == to) to_id++;
        g[from].push_back(_edge{to, to_id, cap});
        g[to].push_back(_edge{from, from_id, 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);
        assert(s != t);

        std::vector<int> level(_n), iter(_n);
        internal::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) return res;
            }
            level[v] = _n;
            return res;
        };

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

}  // namespace atcoder


#line 1 "/workspaces/compro/lib/template.hpp"


#line 1 "/workspaces/compro/lib/Assert/Assert.hpp"


#line 6 "/workspaces/compro/lib/Assert/Assert.hpp"

#ifdef LOCAL

#define ASSERT_MSG(expr, msg)                                                                                          \
  do {                                                                                                                 \
    if (!(expr)) {                                                                                                     \
      std::cerr << msg << std::endl;                                                                                   \
      assert(expr);                                                                                                    \
    }                                                                                                                  \
  } while (0)

#define FAIL() ASSERT_MSG(false, "到達しない想定の場所に到達しました")

#else

#define ASSERT_MSG(...) (void)0
#define FAIL() (void)0

#endif


#line 2 "/workspaces/compro/lib/IO/Pair.hpp"

#ifndef IO_PAIR
#define IO_PAIR

template <class T1, class T2> std::ostream &operator<<(std::ostream &out, const std::pair<T1, T2> &p) {
  std::cout << p.first << ' ' << p.second;
  return out;
}

template <class T1, class T2> std::istream &operator>>(std::istream &in, std::pair<T1, T2> &p) {
  std::cin >> p.first >> p.second;
  return in;
}

#endif
#line 3 "/workspaces/compro/lib/IO/Vector.hpp"

#ifndef IO_VECTOR
#define IO_VECTOR

template <class T> std::ostream &operator<<(std::ostream &out, const std::vector<T> &v) {
  int size = v.size();
  for (int i = 0; i < size; i++) {
    std::cout << v[i];
    if (i != size - 1)
      std::cout << " ";
  }
  return out;
}

template <class T> std::istream &operator>>(std::istream &in, std::vector<T> &v) {
  for (auto &el : v) {
    std::cin >> el;
  }
  return in;
}

#endif
#line 7 "/workspaces/compro/lib/template.hpp"
#define REP(i, n) for (int i = 0; i < (n); i++)
#define FOR(i, m, n) for (int i = (m); i < (n); i++)
#define RREP(i, n) for (int i = (n - 1); i >= 0; i--)
#define RFOR(i, m, n) for (int i = (n - 1); i >= (m); i--)
#define ALL(v) std::begin(v), std::end(v)
#define coutd(n) cout << fixed << setprecision(n)
#define ll long long int
#define vl vector<ll>
#define vi vector<int>
#define MM << " " <<

using namespace std;

template <class T> void chmin(T &a, T b) {
  if (a > b)
    a = b;
}

template <class T> void chmax(T &a, T b) {
  if (a < b)
    a = b;
}

template <class F, class T> bool if_all(std::vector<T> &v, F &&func) {
  return std::all_of(std::begin(v), std::end(v), func);
}

template <class F, class T> bool if_any(std::vector<T> &v, F &&func) {
  return std::any_of(std::begin(v), std::end(v), func);
}


#line 5 "main.cpp"

long long solve(long long N, int M, long long d, const std::vector<long long> &u, const std::vector<long long> &v,
                const std::vector<long long> &p, const std::vector<long long> &q, const std::vector<long long> &w) {
  map<pair<int, int>, int> mp;
  {
    int idx = 0;
    REP(i, M) {
      mp[{u[i], p[i]}] = idx;
      idx++;
      mp[{v[i], q[i] + d}] = idx;
      idx++;
    }
    mp[{0, -1}] = idx;
    idx++;
    mp[{N - 1, 1e9 + d}] = idx;
    idx++;
  }
  int s = mp[{0, -1}];
  int t = mp[{N - 1, 1e9 + d}];

  atcoder::mf_graph<ll> g(t + 1);

  // 縦に辺を貼る
  {
    vector<vector<int>> vs(N);
    vs[0].push_back(-1);
    vs[N - 1].push_back(1e9 + d);
    REP(i, M) {
      vs[u[i]].push_back(p[i]);
      vs[v[i]].push_back(q[i] + d);
    }

    REP(i, N) {
      auto &vec = vs[i];
      sort(ALL(vec));
      int len = vec.size();
      REP(j, len - 1) {
        int from = mp[{i, vec[j]}];
        int to = mp[{i, vec[j + 1]}];
        if (from != to)
          g.add_edge(from, to, 1e18);
      }
    }

    REP(i, M) {
      int from = mp[{u[i], p[i]}];
      int to = mp[{v[i], q[i] + d}];
      g.add_edge(from, to, w[i]);
    }
  }

  return g.flow(s, t);
}

// generated by oj-template v4.8.1 (https://github.com/online-judge-tools/template-generator)
int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  long long N;
  int M;
  long long d;
  std::cin >> N >> M;
  std::vector<long long> u(M), v(M), p(M), q(M), w(M);
  std::cin >> d;
  for (int i = 0; i < M; ++i) {
    std::cin >> u[i] >> v[i] >> p[i] >> q[i] >> w[i];
    u[i]--;
    v[i]--;
  }
  auto ans = solve(N, M, d, u, v, p, q, w);
  std::cout << ans << '\n';
  return 0;
}

yukicoder

結果

テストケース

ソースコード