結果

問題 No.94 圏外です。(EASY)
ユーザー eitaho
提出日時 2015-03-14 01:59:02
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 61 ms / 5,000 ms
コード長 3,684 bytes
コンパイル時間 1,298 ms
コンパイル使用メモリ 118,572 KB
実行使用メモリ 28,268 KB
最終ジャッジ日時 2024-06-26 07:30:02
合計ジャッジ時間 3,212 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
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
other AC * 22
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
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

diff #
プレゼンテーションモードにする

using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Enu = System.Linq.Enumerable;
class Program
{
void Solve()
{
int N = reader.Int();
var Pos = reader.IntGrid(N);
double ans = 1;
var uf = new UnionFind(N);
Func<int, int> Pow = n => n * n;
Func<int, int, int> D2 = (a,b) => Pow(Pos[a][0]-Pos[b][0]) + Pow(Pos[a][1]-Pos[b][1]);
for (int a = 0; a < N; a++)
for (int b = a + 1; b < N; b++)
if (D2(a,b) <= 100)
uf.Unite(a, b);
for (int a = 0; a < N; a++)
for (int b = a; b < N; b++)
if (uf.Same(a, b))
ans = Math.Max(ans, Math.Sqrt(D2(a, b)) + 2);
Console.WriteLine(ans);
}
class UnionFind
{
private int[] parent;
private int[] rank;
private int[] numElements;
public UnionFind(int N)
{
parent = new int[N];
rank = new int[N];
numElements = new int[N];
for (int i = 0; i < N; i++)
{
parent[i] = i;
numElements[i] = 1;
}
}
public int Root(int x)
{
if (parent[x] == x) return x;
return parent[x] = Root(parent[x]);
}
public bool Same(int x, int y)
{
return Root(x) == Root(y);
}
public int NumElements(int x)
{
return numElements[Root(x)];
}
public void Unite(int x, int y)
{
x = Root(x); y = Root(y);
if (x == y) return;
if (rank[x] < rank[y])
{
parent[x] = y;
numElements[y] += numElements[x];
}
else
{
parent[y] = x;
if (rank[x] == rank[y]) { rank[x]++; }
numElements[x] += numElements[y];
}
}
}
Reader reader = new Reader(Console.In);
static void Main() { new Program().Solve(); }
}
class Reader
{
private readonly TextReader reader;
private readonly char[] separator = { ' ' };
private readonly StringSplitOptions removeOp = StringSplitOptions.RemoveEmptyEntries;
private string[] A = new string[0];
private int i;
public Reader(TextReader r) { reader = r; }
public Reader(string file) { reader = new StreamReader(file); }
public bool HasNext() { return Enqueue(); }
public string String() { return Dequeue(); }
public int Int() { return int.Parse(Dequeue()); }
public long Long() { return long.Parse(Dequeue()); }
public double Double() { return double.Parse(Dequeue()); }
public int[] IntLine() { var s = Line(); return s == "" ? new int[0] : Array.ConvertAll(Split(s), int.Parse); }
public int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
public int[][] IntGrid(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
public string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
public string Line() { return reader.ReadLine().Trim(); }
private string[] Split(string s) { return s.Split(separator, removeOp); }
private bool Enqueue()
{
if (i < A.Length) return true;
string line = reader.ReadLine();
if (line == null) return false;
if (line == "") return Enqueue();
A = Split(line);
i = 0;
return true;
}
private string Dequeue() { Enqueue(); return A[i++]; }
}
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