結果
問題 | No.94 圏外です。(EASY) |
ユーザー |
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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 |
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ファイルパターン | 結果 |
---|---|
other | AC * 22 |
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.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++]; }}