結果
問題 | No.132 点と平面との距離 |
ユーザー |
![]() |
提出日時 | 2015-05-22 18:11:10 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 338 ms / 5,000 ms |
コード長 | 5,386 bytes |
コンパイル時間 | 2,122 ms |
コンパイル使用メモリ | 111,616 KB |
実行使用メモリ | 22,912 KB |
最終ジャッジ日時 | 2024-07-06 04:45:12 |
合計ジャッジ時間 | 1,888 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 |
---|---|
other | AC * 3 |
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;using System.Collections.Generic;using Debug = System.Diagnostics.Debug;using StringBuilder = System.Text.StringBuilder;using System.Numerics;namespace Program{public class Solver{public void Solve(){var n = sc.Integer();var p = new Point(sc.Double(), sc.Double(), sc.Double());var ps = Enumerate(n, x => new Point(sc.Double(), sc.Double(), sc.Double()));var ans = 0.0;for (int i = 0; i < n; i++)for (int j = i + 1; j < n; j++)for (int k = j + 1; k < n; k++)ans += Geometry.GetDistance(p, ps[i], ps[j], ps[k]);IO.Printer.Out.WriteLine(ans);}public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }}}#region Exnamespace Program.IO{using System.IO;using System.Text;using System.Globalization;public class Printer : StreamWriter{static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }public static Printer Out { get; set; }public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }public void Write<T>(string format, IEnumerable<T> source) { base.Write(format, source.OfType<object>().ToArray()); }public void WriteLine<T>(string format, IEnumerable<T> source) { base.WriteLine(format, source.OfType<object>().ToArray()); }}public class StreamScanner{public StreamScanner(Stream stream) { str = stream; }public readonly Stream str;private readonly byte[] buf = new byte[1024];private int len, ptr;public bool isEof = false;public bool IsEndOfStream { get { return isEof; } }private byte read(){if (isEof) return 0;if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }return buf[ptr++];}public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }public string Scan(){var sb = new StringBuilder();for (var b = Char(); b >= 33 && b <= 126; b = (char)read())sb.Append(b);return sb.ToString();}public long Long(){if (isEof) return long.MinValue;long ret = 0; byte b = 0; var ng = false;do b = read();while (b != '-' && (b < '0' || '9' < b));if (b == '-') { ng = true; b = read(); }for (; true; b = read()){if (b < '0' || '9' < b)return ng ? -ret : ret;else ret = ret * 10 + b - '0';}}public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }public double Double() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }private T[] enumerate<T>(int n, Func<T> f){var a = new T[n];for (int i = 0; i < n; ++i) a[i] = f();return a;}public char[] Char(int n) { return enumerate(n, Char); }public string[] Scan(int n) { return enumerate(n, Scan); }public double[] Double(int n) { return enumerate(n, Double); }public int[] Integer(int n) { return enumerate(n, Integer); }public long[] Long(int n) { return enumerate(n, Long); }}}static class Ex{static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }static public void Main(){var solver = new Program.Solver();solver.Solve();Program.IO.Printer.Out.Flush();}}#endregionpublic struct Point{public double x, y, z;public Point(double a, double b, double c) : this() { x = a; y = b; z = c; }}static public partial class Geometry{static public Point Cross(Point u, Point v){var a = u.y * v.z - v.y * u.z;var b = u.z * v.x - v.z * u.x;var c = u.x * v.y - v.x * u.y;return new Point(a, b, c);}static public double GetDistance(Point p, Point a, Point b, Point c){var s = GetSurface(a, b, c);var u = Math.Abs(s[0] * p.x + s[1] * p.y + s[2] * p.z + s[3]);var v = Math.Sqrt(s[0] * s[0] + s[1] * s[1] + s[2] * s[2]);return u / v;}static public double[] GetSurface(Point p, Point q, Point r){var pq = new Point(q.x - p.x, q.y - p.y, q.z - p.z);var pr = new Point(r.x - p.x, r.y - p.y, r.z - p.z);var v = Cross(pq, pr);return new double[] { v.x, v.y, v.z, -(v.x * p.x + v.y * p.y + v.z * p.z) };}}