結果
問題 | No.1041 直線大学 |
ユーザー |
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提出日時 | 2021-01-15 01:36:21 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 34 ms / 2,000 ms |
コード長 | 3,154 bytes |
コンパイル時間 | 946 ms |
コンパイル使用メモリ | 110,592 KB |
実行使用メモリ | 19,200 KB |
最終ジャッジ日時 | 2024-11-16 08:10:38 |
合計ジャッジ時間 | 3,176 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 37 |
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; using System.Collections.Generic; using System.Diagnostics; using System.IO; using System.Linq; using System.Numerics; using System.Text; using System.Text.RegularExpressions; using System.Threading.Tasks; using static System.Math; using MethodImplAttribute = System.Runtime.CompilerServices.MethodImplAttribute; using MethodImplOptions = System.Runtime.CompilerServices.MethodImplOptions; public static class P { public static void Main() { int n = int.Parse(Console.ReadLine()); var a = Enumerable.Repeat(0, n).Select(_ => Console.ReadLine().Split().Select(int.Parse).ToArray()).Select(x => new Vector(x[0], x[1])).ToArray(); int res = 0; for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { int cnt = 0; var d1 = a[j] - a[i]; for (int k = 0; k < n; k++) { var d2 = a[k] - a[i]; if (Vector.CrossProduct(d1, d2) == 0) cnt++; } res = Max(res, cnt); } } Console.WriteLine(res); } } struct Vector { public int x; public int y; public int this[int index] { [MethodImpl(MethodImplOptions.AggressiveInlining)] get { if (index == 0) return x; else return y; } [MethodImpl(MethodImplOptions.AggressiveInlining)] set { if (index == 0) x = value; else y = value; } } public int Length => x * x + y * y; public double SqrtLength => Math.Sqrt(Length); [MethodImpl(MethodImplOptions.AggressiveInlining)] public Vector(int x, int y) { this.x = x; this.y = y; } [MethodImpl(MethodImplOptions.AggressiveInlining)] public Vector RotateVector(double radian) => new Vector((int)(x * Math.Cos(radian) - y * Math.Sin(radian)), (int)(x * Math.Sin(radian) + y * Math.Cos(radian))); [MethodImpl(MethodImplOptions.AggressiveInlining)] static public int CrossProduct(Vector a, Vector b) => a.x * b.y - a.y * b.x; [MethodImpl(MethodImplOptions.AggressiveInlining)] static public int InnerProduct(Vector a, Vector b) => a.x * b.x + a.y * b.y; [MethodImpl(MethodImplOptions.AggressiveInlining)] public static Vector operator +(Vector a, Vector b) => new Vector(a.x + b.x, a.y + b.y); [MethodImpl(MethodImplOptions.AggressiveInlining)] public static Vector operator -(Vector a, Vector b) => new Vector(a.x - b.x, a.y - b.y); [MethodImpl(MethodImplOptions.AggressiveInlining)] public static bool operator ==(Vector a, Vector b) => a.x == b.x && a.y == b.y; [MethodImpl(MethodImplOptions.AggressiveInlining)] public static bool operator !=(Vector a, Vector b) => a.x != b.x || a.y != b.y; [MethodImpl(MethodImplOptions.AggressiveInlining)] public override bool Equals(object obj) => this == (Vector)obj; [MethodImpl(MethodImplOptions.AggressiveInlining)] public override int GetHashCode() => x.GetHashCode() * 1000000007 + y.GetHashCode(); [MethodImpl(MethodImplOptions.AggressiveInlining)] public override string ToString() => $"({x},{y})"; }