結果
| 問題 |
No.119 旅行のツアーの問題
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2015-06-12 14:52:43 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 38 ms / 5,000 ms |
| コード長 | 4,935 bytes |
| コンパイル時間 | 1,229 ms |
| コンパイル使用メモリ | 116,024 KB |
| 実行使用メモリ | 27,472 KB |
| 最終ジャッジ日時 | 2024-12-21 10:48:28 |
| 合計ジャッジ時間 | 2,579 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 19 |
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.9.0-6.21124.20 (db94f4cc) Copyright (C) Microsoft Corporation. All rights reserved.
ソースコード
using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using Enu = System.Linq.Enumerable;
class Program
{
public void Solve()
{
int N = Reader.Int();
var Val = Reader.IntTable(N);
int M = Reader.Int();
var Es = Reader.IntTable(M);
int S = N * 2, T = S + 1;
var dinic = new Dinic(T + 1);
for (int i = 0; i < N; i++)
{
dinic.AddEdge(S, i, Val[i][0]);
dinic.AddEdge(i, N + i, Val[i].Sum());
dinic.AddEdge(N + i, T, Val[i][1]);
}
foreach (var e in Es)
dinic.AddEdge(e[0], N + e[1], Dinic.INF);
int ans = Val.Sum(v => v.Sum()) - dinic.MaxFlow(S, T);
Console.WriteLine(ans);
}
class Dinic
{
public static readonly int INF = (int)1e9;
List<Edge>[] G;
int S, T;
int[] level;
int[] iter;
public Dinic(int V)
{
G = new List<Edge>[V];
for (int i = 0; i < V; i++) G[i] = new List<Edge>();
}
public void AddEdge(int from, int to, int capacity)
{
G[from].Add(new Edge(to, capacity, G[to].Count));
G[to].Add(new Edge(from, 0, G[from].Count - 1));
}
public int MaxFlow(int s, int t)
{
S = s; T = t;
int flow = 0;
while (true)
{
BFS();
if (level[T] < 0) return flow;
iter = new int[G.Length];
int f;
while ((f = DFS(S, INF)) > 0) { flow += f; }
}
}
private void BFS()
{
level = Enumerable.Repeat(-1, G.Length).ToArray();
Queue<int> que = new Queue<int>();
que.Enqueue(S);
level[S] = 0;
while (que.Count > 0)
{
int v = que.Dequeue();
foreach (Edge e in G[v])
if (e.capacity > 0 && level[e.to] < 0)
{
level[e.to] = level[v] + 1;
que.Enqueue(e.to);
}
}
}
private int DFS(int v, int flow)
{
if (v == T) return flow;
while (iter[v] < G[v].Count)
{
Edge e = G[v][iter[v]];
if (e.capacity > 0 && level[v] < level[e.to])
{
int d = DFS(e.to, Math.Min(flow, e.capacity));
if (d > 0)
{
e.capacity -= d;
G[e.to][e.reverse].capacity += d;
return d;
}
}
iter[v]++;
}
return 0;
}
class Edge
{
public int to, reverse;
public int capacity;
public Edge(int to, int capacity, int reverse)
{
this.to = to;
this.capacity = capacity;
this.reverse = reverse;
}
}
}
}
class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
private static TextReader reader = Console.In;
private static readonly char[] separator = { ' ' };
private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
private static string[] A = new string[0];
private static int i;
private static void Init() { A = new string[0]; }
public static void Set(TextReader r) { reader = r; Init(); }
public static void Set(string file) { reader = new StreamReader(file); Init(); }
public static bool HasNext() { return CheckNext(); }
public static string String() { return Next(); }
public static int Int() { return int.Parse(Next()); }
public static long Long() { return long.Parse(Next()); }
public static double Double() { return double.Parse(Next()); }
public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
public static string Line() { return reader.ReadLine().Trim(); }
private static string[] Split(string s) { return s.Split(separator, op); }
private static string Next() { CheckNext(); return A[i++]; }
private static bool CheckNext()
{
if (i < A.Length) return true;
string line = reader.ReadLine();
if (line == null) return false;
if (line == "") return CheckNext();
A = Split(line);
i = 0;
return true;
}
}
eitaho