結果
| 問題 | No.416 旅行会社 |
| ユーザー |
 紙ぺーぱー
|
| 提出日時 | 2016-08-26 22:42:23 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 378 ms / 4,000 ms |
| コード長 | 6,897 bytes |
| コンパイル時間 | 1,317 ms |
| コンパイル使用メモリ | 116,544 KB |
| 実行使用メモリ | 56,192 KB |
| 最終ジャッジ日時 | 2024-12-14 19:44:23 |
| 合計ジャッジ時間 | 6,589 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge5 |
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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.Linq;
using System.Linq.Expressions;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Number = System.Int64;
namespace Program
{
public class Solver
{
public void Solve()
{
var n = sc.Integer();
var m = sc.Integer();
var q = sc.Integer();
var a = new int[m];
var b = new int[m];
var c = new int[q];
var d = new int[q];
var use = new SortedSet<long>();
var s = new WeighedQuickUnion(n);
for (int i = 0; i < m; i++)
{
a[i] = sc.Integer() - 1;
b[i] = sc.Integer() - 1;
if (a[i] > b[i]) Swap(ref a[i], ref b[i]);
}
for (int i = 0; i < q; i++)
{
c[i] = sc.Integer() - 1;
d[i] = sc.Integer() - 1;
if (c[i] > d[i]) Swap(ref c[i], ref d[i]);
}
for (int i = 0; i < q; i++)
use.Add(c[i] * 1000000L + d[i]);
for (int i = 0; i < m; i++)
{
if (use.Contains(a[i] * 1000000L + b[i])) continue;
s.Unite(a[i], b[i]);
}
var ans = new int[n];
for (int i = 0; i < n; i++)
if (s.Same(i, 0)) ans[i] = -1;
for (int i = q - 1; i >= 0; i--)
{
if (!s.Same(c[i], d[i]))
{
if (s.Same(d[i], 0))
foreach (var x in s.group[c[i]])
{
Debug.Assert(ans[x] == 0);
ans[x] = i + 1;
}
if (s.Same(c[i], 0))
foreach (var x in s.group[d[i]])
{
Debug.Assert(ans[x] == 0);
ans[x] = i + 1;
}
s.Unite(c[i], d[i]);
}
}
for (int i = 1; i < n; i++)
IO.Printer.Out.WriteLine(ans[i]);
}
public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }
static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
}
}
#region main
static class Ex
{
static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }
static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }
static public void Main()
{
var solver = new Program.Solver();
solver.Solve();
Program.IO.Printer.Out.Flush();
}
}
#endregion
#region Ex
namespace Program.IO
{
using System.IO;
using System.Text;
using System.Globalization;
public class Printer: StreamWriter
{
static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }
public static Printer Out { get; set; }
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }
public void Write<T>(string format, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
public void WriteLine<T>(string format, T[] source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
public readonly Stream str;
private readonly byte[] buf = new byte[1024];
private int len, ptr;
public bool isEof = false;
public bool IsEndOfStream { get { return isEof; } }
private byte read()
{
if (isEof) return 0;
if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }
return buf[ptr++];
}
public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }
public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
sb.Append(b);
return sb.ToString();
}
public string ScanLine()
{
var sb = new StringBuilder();
for (var b = Char(); b != '\n'; b = (char)read())
if (b == 0) break;
else if (b != '\r') sb.Append(b);
return sb.ToString();
}
public long Long()
{
if (isEof) return long.MinValue;
long ret = 0; byte b = 0; var ng = false;
do b = read();
while (b != 0 && b != '-' && (b < '0' || '9' < b));
if (b == 0) return long.MinValue;
if (b == '-') { ng = true; b = read(); }
for (; true; b = read())
{
if (b < '0' || '9' < b)
return ng ? -ret : ret;
else ret = ret * 10 + b - '0';
}
}
public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }
public double Double() { var s = Scan(); return s != "" ? double.Parse(s, CultureInfo.InvariantCulture) : double.NaN; }
private T[] enumerate<T>(int n, Func<T> f)
{
var a = new T[n];
for (int i = 0; i < n; ++i) a[i] = f();
return a;
}
public char[] Char(int n) { return enumerate(n, Char); }
public string[] Scan(int n) { return enumerate(n, Scan); }
public double[] Double(int n) { return enumerate(n, Double); }
public int[] Integer(int n) { return enumerate(n, Integer); }
public long[] Long(int n) { return enumerate(n, Long); }
}
}
#endregion
#region WeightedQuickUnion
public class WeighedQuickUnion
{
public List<int>[] group;
public WeighedQuickUnion(int n)
{
group = new List<int>[n];
for (int i = 0; i < n; i++)
group[i] = new List<int>() { i };
}
public void Unite(int i, int j)
{
if (Same(i, j)) return;
var a = group[i];
var b = group[j];
if (a.Count < b.Count) { var tmp = a; a = b; b = tmp; }
foreach (var x in b)
{
group[x] = a;
a.Add(x);
}
}
public bool Same(int i, int j)
{
return group[i] == group[j];
}
}
#endregion