結果

問題 No.132 点と平面との距離
ユーザー 紙ぺーぱー
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
このコードへのチャレンジ
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ファイルパターン 結果
other AC * 3
権限があれば一括ダウンロードができます
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

diff #
プレゼンテーションモードにする

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 Ex
namespace 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();
}
}
#endregion
public 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) };
}
}
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