結果
| 問題 |
No.94 圏外です。(EASY)
|
| コンテスト | |
| ユーザー |
AreTrash
|
| 提出日時 | 2016-09-23 09:26:17 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 55 ms / 5,000 ms |
| コード長 | 3,467 bytes |
| コンパイル時間 | 1,089 ms |
| コンパイル使用メモリ | 110,976 KB |
| 実行使用メモリ | 20,608 KB |
| 最終ジャッジ日時 | 2024-06-26 08:03:45 |
| 合計ジャッジ時間 | 2,787 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 |
|---|---|
| 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.Linq;
namespace No94{
public class Program{
public static void Main(string[] args){
var sr = new StreamReader();
//---------------------------------
var N = sr.Next<int>();
var R = sr.Next<int>(N, 2).Select(a => new{X = a[0], Y = a[1]}).ToArray();
Func<int, int, int, int, double> dist = (x1, y1, x2, y2) => Math.Sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
var uf = new UnionFind(N);
for(var i = 0; i < N; i++){
for(var j = i + 1; j < N; j++){
if(dist(R[i].X, R[i].Y, R[j].X, R[j].Y) <= 10.0) uf.Unite(i, j);
}
}
var res = 1.0 + Math.Sign(N);
for(var i = 0; i < N; i++){
for(var j = i + 1; j < N; j++){
if(uf.IsSameSet(i, j)) res = Math.Max(res, 2.0 + dist(R[i].X, R[i].Y, R[j].X, R[j].Y));
}
}
Console.WriteLine(res);
//---------------------------------
}
}
public class Ex{
public static void Swap<T>(ref T left, ref T right){
var tmp = left;
left = right;
right = tmp;
}
}
public class UnionFind{
private readonly int[] _rank;
private readonly int[] _p;
public UnionFind(int size){
_rank = new int[size];
_p = new int[size];
for(var i = 0; i < size; i++){
_rank[i] = 0;
_p[i] = i;
}
}
public void Unite(int x, int y){
x = FindSet(x);
y = FindSet(y);
if(_rank[x] > _rank[y]) _p[y] = x;
if(_rank[x] < _rank[y]) _p[x] = y;
if(_rank[x] == _rank[y]){
_p[x] = y;
_rank[y]++;
}
}
public bool IsSameSet(int x, int y){
return FindSet(x) == FindSet(y);
}
public int FindSet(int x){
if(_p[x] == x) return x;
return _p[x] = FindSet(_p[x]);
}
}
public class StreamReader{
private readonly char[] _c = {' '};
private int _index = -1;
private string[] _input = new string[0];
private readonly System.IO.StreamReader _sr = new System.IO.StreamReader(Console.OpenStandardInput());
public T Next<T>(){
if(_index == _input.Length - 1){
_index = -1;
while(true){
string rl = _sr.ReadLine();
if(rl == null){
if(typeof(T).IsClass) return default(T);
return (T)typeof(T).GetField("MinValue").GetValue(null);
}
if(rl != ""){
_input = rl.Split(_c, StringSplitOptions.RemoveEmptyEntries);
break;
}
}
}
return (T)Convert.ChangeType(_input[++_index], typeof(T), System.Globalization.CultureInfo.InvariantCulture);
}
public T[] Next<T>(int x){
var ret = new T[x];
for(var i = 0; i < x; ++i) ret[i] = Next<T>();
return ret;
}
public T[][] Next<T>(int y, int x){
var ret = new T[y][];
for(var i = 0; i < y; ++i) ret[i] = Next<T>(x);
return ret;
}
}
}
AreTrash