結果

問題 No.1678 Coin Trade (Multiple)
ユーザー keijakkeijak
提出日時 2021-09-13 18:00:54
言語 C++17
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 1,306 ms / 5,000 ms
コード長 6,456 bytes
コンパイル時間 3,126 ms
コンパイル使用メモリ 227,304 KB
実行使用メモリ 12,896 KB
最終ジャッジ日時 2023-09-08 01:34:22
合計ジャッジ時間 24,327 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge13
このコードへのチャレンジ（β）

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
4,380 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 1 ms
4,380 KB
testcase_03 AC 110 ms
8,228 KB
testcase_04 AC 597 ms
11,012 KB
testcase_05 AC 218 ms
12,380 KB
testcase_06 AC 162 ms
11,896 KB
testcase_07 AC 589 ms
8,768 KB
testcase_08 AC 378 ms
9,332 KB
testcase_09 AC 264 ms
12,428 KB
testcase_10 AC 174 ms
5,928 KB
testcase_11 AC 448 ms
10,604 KB
testcase_12 AC 139 ms
6,348 KB
testcase_13 AC 964 ms
11,920 KB
testcase_14 AC 325 ms
8,048 KB
testcase_15 AC 313 ms
10,384 KB
testcase_16 AC 67 ms
10,364 KB
testcase_17 AC 253 ms
12,544 KB
testcase_18 AC 2 ms
4,380 KB
testcase_19 AC 1 ms
4,376 KB
testcase_20 AC 2 ms
4,376 KB
testcase_21 AC 2 ms
4,376 KB
testcase_22 AC 1 ms
4,380 KB
testcase_23 AC 2 ms
4,384 KB
testcase_24 AC 2 ms
4,380 KB
testcase_25 AC 2 ms
4,380 KB
testcase_26 AC 2 ms
4,384 KB
testcase_27 AC 1 ms
4,380 KB
testcase_28 AC 2 ms
4,380 KB
testcase_29 AC 1 ms
4,384 KB
testcase_30 AC 1 ms
4,376 KB
testcase_31 AC 1 ms
4,376 KB
testcase_32 AC 2 ms
4,380 KB
testcase_33 AC 2 ms
4,380 KB
testcase_34 AC 2 ms
4,376 KB
testcase_35 AC 2 ms
4,380 KB
testcase_36 AC 2 ms
4,380 KB
testcase_37 AC 2 ms
4,380 KB
testcase_38 AC 2 ms
4,380 KB
testcase_39 AC 2 ms
4,384 KB
testcase_40 AC 2 ms
4,380 KB
testcase_41 AC 2 ms
4,376 KB
testcase_42 AC 2 ms
4,380 KB
testcase_43 AC 2 ms
4,376 KB
testcase_44 AC 2 ms
4,380 KB
testcase_45 AC 2 ms
4,380 KB
testcase_46 AC 1 ms
4,380 KB
testcase_47 AC 2 ms
4,380 KB
testcase_48 AC 1,200 ms
12,836 KB
testcase_49 AC 1,226 ms
12,704 KB
testcase_50 AC 1,306 ms
12,884 KB
testcase_51 AC 1,248 ms
12,892 KB
testcase_52 AC 1,242 ms
12,864 KB
testcase_53 AC 1,235 ms
12,896 KB
testcase_54 AC 1,190 ms
12,780 KB
testcase_55 AC 1,154 ms
12,788 KB
testcase_56 AC 1,141 ms
12,768 KB
testcase_57 AC 1,241 ms
12,772 KB
testcase_58 AC 584 ms
12,484 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>

#include <atcoder/mincostflow>
#include <ext/pb_ds/priority_queue.hpp>
#include <ext/pb_ds/tag_and_trait.hpp>

#define REP_(i, a_, b_, a, b, ...) \
  for (int i = (a), END_##i = (b); i < END_##i; ++i)
#define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__)
#define ALL(x) std::begin(x), std::end(x)
using i64 = long long;

template <typename T, typename U>
inline bool chmax(T &a, U b) {
  return a < b and ((a = std::move(b)), true);
}
template <typename T, typename U>
inline bool chmin(T &a, U b) {
  return a > b and ((a = std::move(b)), true);
}
template <typename T>
inline int ssize(const T &a) {
  return (int)std::size(a);
}

template <typename T>
std::istream &operator>>(std::istream &is, std::vector<T> &a) {
  for (auto &x : a) is >> x;
  return is;
}
template <typename T, typename U>
std::ostream &operator<<(std::ostream &os, const std::pair<T, U> &a) {
  return os << "(" << a.first << ", " << a.second << ")";
}
template <typename Container>
std::ostream &print_seq(const Container &a, std::string_view sep = " ",
                        std::string_view ends = "\n",
                        std::ostream &os = std::cout) {
  auto b = std::begin(a), e = std::end(a);
  for (auto it = std::begin(a); it != e; ++it) {
    if (it != b) os << sep;
    os << *it;
  }
  return os << ends;
}
template <typename T, typename = void>
struct is_iterable : std::false_type {};
template <typename T>
struct is_iterable<T, std::void_t<decltype(std::begin(std::declval<T>())),
                                  decltype(std::end(std::declval<T>()))>>
    : std::true_type {};

template <typename T, typename = std::enable_if_t<
                          is_iterable<T>::value &&
                          !std::is_same<T, std::string_view>::value &&
                          !std::is_same<T, std::string>::value>>
std::ostream &operator<<(std::ostream &os, const T &a) {
  return print_seq(a, ", ", "", (os << "{")) << "}";
}

void print() { std::cout << "\n"; }
template <class T>
void print(const T &x) {
  std::cout << x << "\n";
}
template <typename Head, typename... Tail>
void print(const Head &head, Tail... tail) {
  std::cout << head << " ";
  print(tail...);
}

struct Input {
  template <typename T>
  operator T() const {
    T x;
    std::cin >> x;
    return x;
  }
} in;

#ifdef MY_DEBUG
#include "debug_dump.hpp"
#else
#define DUMP(...)
#endif

using namespace std;

template <typename Cap, typename Cost>
class MinCostFlowDAG {
 public:
  static constexpr Cost INF = std::numeric_limits<Cost>::max();

  struct Edge {
    int to, rev;
    Cap cap;
    Cost cost;
  };

  const int V;
  std::vector<vector<Edge>> G;
  std::vector<Cost> h, dist;
  std::vector<int> deg, ord, prevv, preve;

  explicit MinCostFlowDAG(int node_count)
      : V(node_count),
        G(V),
        h(V, INF),
        dist(V, 0),
        deg(V, 0),
        prevv(V),
        preve(V) {}

  void add_edge(const int from, const int to, const Cap cap, const Cost cost) {
    if (cap == 0) return;
    G[from].push_back(Edge{to, (int)G[to].size(), cap, cost});
    G[to].push_back(Edge{from, (int)G[from].size() - 1, 0, -cost});
    ++deg[to];
  }

  std::optional<Cost> flow(const int s, const int t, Cap f) {
    assert(topological_sort());  // must be a DAG.
    calc_potential(s);
    Cost res = 0;
    while (f > 0) {
      dijkstra(s);
      if (dist[t] == INF) return std::nullopt;
      update(s, t, f, res);
    }
    return res;
  }

 private:
  using DijkstraState = pair<i64, int>;
  // struct DijkstraState {
  //   Cost dist;
  //   int node;
  // };
  // friend bool operator>(const DijkstraState &x, const DijkstraState &y) {
  //   return x.dist > y.dist;
  // }
  // friend bool operator<(const DijkstraState &x, const DijkstraState &y) {
  //   return std::tie(x.dist, x.node) < std::tie(y.dist, y.node);
  // }

  bool topological_sort() {
    queue<int> que;
    for (int i = 0; i < V; ++i) {
      if (deg[i] == 0) que.push(i);
    }
    while (!que.empty()) {
      const int p = que.front();
      que.pop();
      ord.push_back(p);
      for (auto &e : G[p]) {
        if (e.cap > 0 && --deg[e.to] == 0) que.push(e.to);
      }
    }
    return (*max_element(deg.begin(), deg.end()) == 0);
  }

  void calc_potential(const int s) {
    h[s] = 0;
    for (const int v : ord) {
      if (h[v] == INF) continue;
      for (const Edge &e : G[v]) {
        if (e.cap > 0) h[e.to] = min(h[e.to], h[v] + e.cost);
      }
    }
  }

  void dijkstra(const int s) {
    using Heap =
        __gnu_pbds::priority_queue<DijkstraState, greater<DijkstraState>,
                                   __gnu_pbds::thin_heap_tag>;
    // boost::heap::fibonacci_heap<DijkstraState>;
    // using Heap = std::priority_queue<DijkstraState,
    // std::vector<DijkstraState>,
    //                                  std::greater<DijkstraState>>;
    Heap heap;
    fill(dist.begin(), dist.end(), INF);
    dist[s] = 0;
    heap.push(DijkstraState{0, s});
    while (not heap.empty()) {
      const auto cur = heap.top();
      heap.pop();
      const int v = cur.second;
      if (dist[v] < cur.first) continue;
      for (int i = 0; i < (int)G[v].size(); ++i) {
        Edge &e = G[v][i];
        if (e.cap > 0 and dist[e.to] > dist[v] + e.cost + h[v] - h[e.to]) {
          dist[e.to] = dist[v] + e.cost + h[v] - h[e.to];
          prevv[e.to] = v;
          preve[e.to] = i;
          heap.push(DijkstraState{dist[e.to], e.to});
        }
      }
    }
  }

  void update(const int s, const int t, Cap &f, Cost &res) {
    for (int i = 0; i < V; i++) {
      if (dist[i] != INF) h[i] += dist[i];
    }
    Cap d = f;
    for (int v = t; v != s; v = prevv[v]) {
      d = min(d, G[prevv[v]][preve[v]].cap);
    }
    f -= d;
    res += h[t] * d;
    for (int v = t; v != s; v = prevv[v]) {
      Edge &e = G[prevv[v]][preve[v]];
      e.cap -= d;
      G[v][e.rev].cap += d;
    }
  }
};

auto solve() {
  const int n = in, K = in;
  vector<i64> a(n);
  MinCostFlowDAG<int, i64> g(n);
  REP(i, n) {
    a[i] = in;
    int m = in;
    REP(j, m) {
      int b = in;
      --b;
      i64 cost = a[b] - a[i];
      if (cost < 0) {
        g.add_edge(b, i, 1, cost);
      }
    }
  }
  REP(i, n - 1) { g.add_edge(i, i + 1, K, 0); }
  auto ans = g.flow(0, n - 1, K);
  assert(ans.has_value());
  return -ans.value();
}

int main() {
  ios_base::sync_with_stdio(false), cin.tie(nullptr);
  auto ans = solve();
  print(ans);
}
0