結果
| 問題 |
No.245 貫け!
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2015-07-17 22:45:09 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,494 bytes |
| コンパイル時間 | 6,311 ms |
| コンパイル使用メモリ | 120,748 KB |
| 実行使用メモリ | 28,780 KB |
| 最終ジャッジ日時 | 2024-07-08 09:15:55 |
| 合計ジャッジ時間 | 5,039 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 7 WA * 9 |
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.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using Enu = System.Linq.Enumerable;
class Program
{
public void Solve()
{
int N = Reader.Int();
var A = new Point[N];
var B = new Point[N];
var candPos = new HashSet<Point>();
int ans = 0;
for (int i = 0; i < N; i++)
{
var p = Reader.IntArray(4);
A[i] = new Point(p[0], p[1]);
B[i] = new Point(p[2], p[3]);
candPos.Add(A[i]);
candPos.Add(B[i]);
}
foreach (var S in candPos)
foreach (var T in candPos)
{
int count = 0;
for (int i = 0; i < N; i++)
if (SegmentIntersect(S, T, A[i], B[i]))
count++;
ans = Math.Max(ans, count);
}
Console.WriteLine(ans);
}
bool SegmentIntersect(Point a1, Point a2, Point b1, Point b2)
{
long c1 = (a2 - a1).Det(b1 - a1);
if (c1 == 0 && (a1 - b1).InnerProduct(a2 - b1) <= 0) return true;
long c2 = (a2 - a1).Det(b2 - a1);
if (c2 == 0 && (a1 - b2).InnerProduct(a2 - b2) <= 0) return true;
long c3 = (b2 - b1).Det(a1 - b1);
if (c3 == 0 && (b1 - a1).InnerProduct(b2 - a1) <= 0) return true;
long c4 = (b2 - b1).Det(a2 - b1);
if (c4 == 0 && (b1 - a2).InnerProduct(b2 - a2) <= 0) return true;
return c1 * c2 < 0 && c3 * c4 < 0;
}
struct Point : IEquatable<Point>, IComparable<Point>
{
public long X, Y;
public Point(long x, long y) { X = x; Y = y; }
public static Point operator +(Point a, Point b)
{
return new Point(a.X + b.X, a.Y + b.Y);
}
public static Point operator -(Point a, Point b)
{
return new Point(a.X - b.X, a.Y - b.Y);
}
public long DistSquare(Point b) { return (X - b.X) * (X - b.X) + (Y - b.Y) * (Y - b.Y); }
public double Dist(Point b) { return Math.Sqrt(DistSquare(b)); }
public long InnerProduct(Point b) { return X * b.X + Y * b.Y; }
public long Det(Point b) { return X * b.Y - Y * b.X; }
public bool OnSegment(Point a, Point b)
{
return (a - this).Det(b - this) == 0 && (a - this).InnerProduct(b - this) <= 0;
}
public override int GetHashCode() { return (int)(X * 100000 + Y); }
public bool Equals(Point b) { return X == b.X && Y == b.Y; }
public int CompareTo(Point b) { return X != b.X ? Math.Sign(X - b.X) : Math.Sign(Y - b.Y); }
public override string ToString() { return X + ", " + Y; }
}
}
class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
private static TextReader reader = Console.In;
private static readonly char[] separator = { ' ' };
private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
private static string[] A = new string[0];
private static int i;
private static void Init() { A = new string[0]; }
public static void Set(TextReader r) { reader = r; Init(); }
public static void Set(string file) { reader = new StreamReader(file); Init(); }
public static bool HasNext() { return CheckNext(); }
public static string String() { return Next(); }
public static int Int() { return int.Parse(Next()); }
public static long Long() { return long.Parse(Next()); }
public static double Double() { return double.Parse(Next()); }
public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
public static string Line() { return reader.ReadLine().Trim(); }
private static string[] Split(string s) { return s.Split(separator, op); }
private static string Next() { CheckNext(); return A[i++]; }
private static bool CheckNext()
{
if (i < A.Length) return true;
string line = reader.ReadLine();
if (line == null) return false;
if (line == "") return CheckNext();
A = Split(line);
i = 0;
return true;
}
}
eitaho