結果
| 問題 |
No.94 圏外です。(EASY)
|
| コンテスト | |
| ユーザー |
sekiya9311
|
| 提出日時 | 2017-10-05 00:49:03 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 59 ms / 5,000 ms |
| コード長 | 5,047 bytes |
| コンパイル時間 | 1,048 ms |
| コンパイル使用メモリ | 110,976 KB |
| 実行使用メモリ | 20,736 KB |
| 最終ジャッジ日時 | 2024-06-26 08:19:09 |
| 合計ジャッジ時間 | 2,739 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / 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.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ProgrammingContest
{
class MainClass
{
Scanner sc;
static void Main(string[] args)
{
new MainClass().Solve();
}
struct Point
{
public double x, y;
}
const bool DEBUG = false; // TODO: must check!!
void Solve()
{
if (DEBUG)
{
string backPath = "..";
char dirSep = System.IO.Path.DirectorySeparatorChar;
string inFilePath = backPath + dirSep + backPath + dirSep + "in.txt";
sc = new Scanner(new System.IO.StreamReader(inFilePath));
}
else
{
sc = new Scanner();
}
int n = sc.NextInt;
Point[] p = new Point[n];
for (int i = 0; i < n; i++)
{
p[i] = new Point();
p[i].x = sc.NextDouble;
p[i].y = sc.NextDouble;
}
UnionFind uf = new UnionFind(n);
for (int i = 0; i < n; i++)
{
for (int j = i + 1; j < n; j++)
{
if (calcDist(p[i], p[j]) <= 10)
{
uf.unite(i, j);
}
}
}
Dictionary<int, int> dic = new Dictionary<int, int>();
int cnt = 0;
for (int i = 0; i < n; i++)
{
if (!dic.ContainsKey(uf.find(i)))
{
dic.Add(uf.find(i), cnt++);
}
}
List<int>[] conLists = new List<int>[dic.Count].Select(el => new List<int>()).ToArray();
for (int i = 0; i < n; i++)
{
conLists[dic[uf.find(i)]].Add(i);
}
double ma = 1;
foreach(List<int> list in conLists)
{
foreach(int idx1 in list)
{
foreach (int idx2 in list)
{
ma = Math.Max(ma, calcDist(p[idx1], p[idx2]) + 2);
}
}
}
Console.WriteLine(ma);
}
double calcDist(Point a, Point b)
{
double x = a.x - b.x;
double y = a.y - b.y;
return Math.Sqrt(x * x + y * y);
}
}
class UnionFind
{
private int[] uni;
int count_;
public UnionFind(int n)
{
this.uni = new int[n].Select(el => -1).ToArray();
}
public int Count()
{
return this.count_;
}
public int Count(int n)
{
return -this.uni[this.find(n)];
}
public int find(int n)
{
return (this.uni[n] < 0 ? n : this.uni[n] = this.find(this.uni[n]));
}
public bool unite(int a, int b)
{
a = this.find(a);
b = this.find(b);
if (a == b)
{
return false;
}
if (this.uni[a] > this.uni[b])
{
int t = a;
a = b;
b = t;
}
this.uni[a] += this.uni[b];
this.uni[b] = a;
this.count_--;
return true;
}
public bool same(int a, int b)
{
return this.find(a) == this.find(b);
}
}
class Scanner
{
Queue<String> buffer;
char[] sep;
System.IO.TextReader reader;
public Scanner(System.IO.TextReader reader = null)
{
this.buffer = new Queue<string>();
this.sep = new char[] { ' ' };
this.reader = (reader ?? Console.In);
}
private void CheckBuffer()
{
if (this.buffer.Count == 0)
{
String[] sreArray = this.reader.ReadLine().Split(this.sep);
foreach (String elStr in sreArray)
{
this.buffer.Enqueue(elStr);
}
}
}
public String Next
{
get
{
this.CheckBuffer();
return this.buffer.Dequeue();
}
}
public int NextInt
{
get
{
return int.Parse(this.Next);
}
}
public double NextDouble
{
get
{
return double.Parse(this.Next);
}
}
public long NextLong
{
get
{
return long.Parse(this.Next);
}
}
public bool IsEmpty
{
get
{
this.CheckBuffer();
return this.buffer.Count == 0;
}
}
}
}
sekiya9311