結果
| 問題 |
No.416 旅行会社
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2016-09-13 00:43:22 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 700 ms / 4,000 ms |
| コード長 | 3,849 bytes |
| コンパイル時間 | 1,155 ms |
| コンパイル使用メモリ | 111,104 KB |
| 実行使用メモリ | 84,660 KB |
| 最終ジャッジ日時 | 2024-12-14 20:19:01 |
| 合計ジャッジ時間 | 9,162 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 21 |
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.Text.RegularExpressions;
using System.Collections.Generic;
using System.Diagnostics;
using Enu = System.Linq.Enumerable;
public class Program
{
static readonly long Big = (long)1e9;
public void Solve()
{
int N = Reader.Int(), M = Reader.Int(), Q = Reader.Int();
var EdgeId = new Dictionary<long, int>();
var E = new int[M][];
var RemovedEdge = new int[Q][];
var Removed = new bool[M];
for (int i = 0; i < M; i++)
{
int a = Reader.Int() - 1, b = Reader.Int() - 1;
E[i] = new[] { a, b };
EdgeId[a * Big + b] = i;
}
for (int i = 0; i < Q; i++)
{
int a = Reader.Int() - 1, b = Reader.Int() - 1;
RemovedEdge[i] = new[] { a, b };
Removed[EdgeId[a * Big + b]] = true;
}
var ans = new int[N];
var comp = new HashSet<int>[N];
var VtoComp = new int[N];
for (int i = 0; i < N; i++)
{
comp[i] = new HashSet<int>(new[] { i });
VtoComp[i] = i;
}
Action<int, int, int> Unite = (a, b, time) =>
{
int ca = VtoComp[a], cb = VtoComp[b];
if (ca == cb) return;
bool zero = comp[ca].Contains(0);
if (!zero && (cb == 0 || comp[ca].Count < comp[cb].Count))
Swap(ref ca, ref cb);
zero = comp[ca].Contains(0);
foreach (int v in comp[cb])
{
comp[ca].Add(v);
VtoComp[v] = ca;
if (zero) ans[v] = time;
}
};
for (int i = 0; i < M; i++)
if (!Removed[i])
Unite(E[i][0], E[i][1], Q + 1);
for (int i = Q - 1; i >= 0; i--)
Unite(RemovedEdge[i][0], RemovedEdge[i][1], i + 1);
Console.WriteLine(string.Join("\n", ans.Skip(1).Select(a => a == Q + 1 ? -1 : a)));
}
static void Swap<T>(ref T a, ref T b) { T t = a; a = b; b = t; }
}
class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
static TextReader reader = Console.In;
static readonly char[] separator = { ' ' };
static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
static string[] A = new string[0];
static int i;
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 Range(N, Int); }
public static int[][] IntTable(int H) { return Range(H, IntLine); }
public static string[] StringArray(int N) { return Range(N, Next); }
public static string[][] StringTable(int N) { return Range(N, () => Split(Line())); }
public static string Line() { return reader.ReadLine().Trim(); }
static string[] Split(string s) { return s.Split(separator, op); }
static T[] Range<T>(int N, Func<T> f) { var r = new T[N]; for (int i = 0; i < N; r[i++] = f()) ; return r; }
static string Next() { CheckNext(); return A[i++]; }
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