結果

問題 No.654 Air E869120
ユーザー テナガザル
提出日時 2024-04-04 15:49:47
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
RE  
実行時間 -
コード長 2,957 bytes
コンパイル時間 1,331 ms
コンパイル使用メモリ 97,336 KB
最終ジャッジ日時 2025-02-20 20:04:56
ジャッジサーバーID
（参考情報） 		judge2 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 5
other AC * 30 RE * 5
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In instantiation of ‘void maxflow<T>::add(int, int, T) [with T = long long int]’:
main.cpp:119:53:   required from here
main.cpp:17:33: warning: narrowing conversion of ‘(&((maxflow<long long int>*)this)->maxflow<long long int>::g.std::vector<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >, std::allocator<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> > > >::operator[](((std::vector<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >, std::allocator<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> > > >::size_type)t)))->std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >::size()’ from ‘std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing]
   17 |     g[s].push_back({t, g[t].size(), f});
      |                        ~~~~~~~~~^~
main.cpp:18:36: warning: narrowing conversion of ‘((&((maxflow<long long int>*)this)->maxflow<long long int>::g.std::vector<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >, std::allocator<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> > > >::operator[](((std::vector<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >, std::allocator<std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> > > >::size_type)s)))->std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >::size() - 1)’ from ‘std::vector<maxflow<long long int>::edge, std::allocator<maxflow<long long int>::edge> >::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing]
   18 |     g[t].push_back({s, g[s].size() - 1, 0});
      |                        ~~~~~~~~~~~~^~~

ソースコード

diff #
プレゼンテーションモードにする

#include <iostream>
#include <algorithm>
#include <stack>
#include <queue>
#include <vector>
template<typename T>
class maxflow
{
  struct edge {int to, rep; T cap;};
  std::vector<std::vector<edge>> g;
  std::vector<int> dis, id;
public:
  maxflow(int n) : g(n), id(n), dis(n) {}
  void add(int s, int t, T f)
  {
    g[s].push_back({t, g[t].size(), f});
    g[t].push_back({s, g[s].size() - 1, 0});
  }
  T flow(int s, int t)
  {
    T ret = 0;
    while (true)
    {
      bfs(s);
      if (dis[t] <= dis[s]) return ret;
      id.assign(id.size(), 0);
      T val;
      while ((val = path(s, t)) > 0) ret += val;
    }
  }
private:
  void bfs(int s)
  {
    dis.assign(g.size(), -1);
    dis[s] = 0;
    std::queue<int> q;
    for (q.push(s); !q.empty(); q.pop())
    {
      int now = q.front();
      for (auto &v : g[now])
      {
        if (v.cap > 0 && dis[v.to] < 0)
        {
          dis[v.to] = dis[now] + 1;
          q.push(v.to);
        }
      }
    }
  }
  T path(int s, int t)
  {
    const T inf = ((1LL << 60) | (1 << 30));
    std::stack<edge> st;
    T ret = inf;
    st.push({s, -1, inf});
    while (!st.empty())
    {
      auto now = st.top();
      st.pop();
      if (now.rep == -1)
      {
        if (now.to == t)
        {
          ret = now.cap;
          break;
        }
        for (int &i = id[now.to]; i < g[now.to].size(); ++i)
        {
          auto &e = g[now.to][i];
          if (dis[e.to] > dis[now.to] && e.cap > 0)
          {
            st.push({e.to, e.rep, 0});
            st.push({e.to, -1, std::min(e.cap, now.cap)});
          }
        }
      }
    }
    if (ret == inf) return 0;
    int now = t;
    while (now != s)
    {
      while (!st.empty() && st.top().to != now) st.pop();
      edge &v1 = st.top(), &v2 = g[v1.to][v1.rep];
      v2.cap += ret;
      g[v2.to][v2.rep].cap -= ret;
      now = v2.to;
    }
    return ret;
  }
};
using namespace std;
int main()
{
  const long long inf = 1LL << 60;
  int n, m, d;
  cin >> n >> m >> d;
  vector<int> u(m), v(m), p(m), q(m), w(m);
  vector<vector<int>> t(n);
  for (int i = 0; i < m; ++i)
  {
    cin >> u[i] >> v[i] >> p[i] >> q[i] >> w[i];
    --u[i], --v[i];
    t[u[i]].push_back(p[i]);
    t[v[i]].push_back(q[i] + d);
  }
  for (int i = 0; i < n; ++i)
  {
    sort(t[i].begin(), t[i].end());
    t[i].erase(unique(t[i].begin(), t[i].end()), t[i].end());
  }
  vector<int> id(n + 1);
  for (int i = 1; i <= n; ++i) id[i] = id[i - 1] + t[i - 1].size();
  maxflow<long long> mf(id[n]);
  for (int i = 0; i < n; ++i)
  {
    for (int j = 0; j < t[i].size() - 1; ++j) mf.add(id[i] + j, id[i] + j + 1, inf);
  }
  for (int i = 0; i < m; ++i)
  {
    int id1 = lower_bound(t[u[i]].begin(), t[u[i]].end(), p[i]) - t[u[i]].begin();
    int id2 = lower_bound(t[v[i]].begin(), t[v[i]].end(), q[i] + d) - t[v[i]].begin();
    mf.add(id[u[i]] + id1, id[v[i]] + id2, w[i]);
  }
  long long ans = mf.flow(0, id[n] - 1);
  cout << ans << endl;
}
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