結果
問題 | No.947 ABC包囲網 |
ユーザー | EmKjp |
提出日時 | 2020-01-05 07:30:30 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 6,929 bytes |
コンパイル時間 | 2,410 ms |
コンパイル使用メモリ | 110,208 KB |
実行使用メモリ | 21,660 KB |
最終ジャッジ日時 | 2024-11-22 21:55:15 |
合計ジャッジ時間 | 6,245 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 31 ms
18,560 KB |
testcase_01 | AC | 31 ms
18,176 KB |
testcase_02 | AC | 31 ms
18,432 KB |
testcase_03 | AC | 31 ms
18,432 KB |
testcase_04 | AC | 31 ms
18,176 KB |
testcase_05 | AC | 31 ms
18,304 KB |
testcase_06 | AC | 31 ms
18,304 KB |
testcase_07 | AC | 31 ms
18,432 KB |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | AC | 32 ms
18,432 KB |
testcase_12 | AC | 31 ms
18,560 KB |
testcase_13 | AC | 33 ms
18,304 KB |
testcase_14 | AC | 31 ms
18,432 KB |
testcase_15 | AC | 32 ms
18,560 KB |
testcase_16 | AC | 32 ms
18,688 KB |
testcase_17 | AC | 32 ms
18,560 KB |
testcase_18 | AC | 33 ms
18,432 KB |
testcase_19 | AC | 33 ms
18,560 KB |
testcase_20 | AC | 33 ms
18,432 KB |
testcase_21 | AC | 33 ms
18,432 KB |
testcase_22 | AC | 32 ms
18,176 KB |
testcase_23 | AC | 33 ms
18,560 KB |
testcase_24 | AC | 33 ms
18,432 KB |
testcase_25 | AC | 32 ms
18,304 KB |
testcase_26 | AC | 32 ms
18,560 KB |
testcase_27 | AC | 32 ms
18,688 KB |
testcase_28 | AC | 45 ms
21,288 KB |
testcase_29 | AC | 45 ms
21,188 KB |
testcase_30 | AC | 44 ms
21,660 KB |
testcase_31 | AC | 48 ms
21,436 KB |
testcase_32 | AC | 47 ms
21,444 KB |
testcase_33 | AC | 47 ms
21,192 KB |
testcase_34 | AC | 46 ms
21,320 KB |
testcase_35 | AC | 46 ms
21,312 KB |
testcase_36 | AC | 47 ms
21,444 KB |
testcase_37 | AC | 47 ms
21,444 KB |
testcase_38 | AC | 46 ms
21,444 KB |
testcase_39 | AC | 46 ms
21,316 KB |
testcase_40 | AC | 44 ms
21,304 KB |
testcase_41 | AC | 43 ms
21,312 KB |
testcase_42 | AC | 44 ms
21,308 KB |
testcase_43 | AC | 45 ms
21,180 KB |
testcase_44 | AC | 45 ms
21,180 KB |
testcase_45 | AC | 45 ms
21,304 KB |
testcase_46 | AC | 43 ms
21,436 KB |
testcase_47 | AC | 44 ms
21,056 KB |
testcase_48 | AC | 44 ms
21,304 KB |
testcase_49 | AC | 46 ms
21,448 KB |
testcase_50 | AC | 44 ms
21,308 KB |
testcase_51 | AC | 32 ms
18,304 KB |
testcase_52 | AC | 32 ms
18,560 KB |
testcase_53 | AC | 32 ms
18,560 KB |
testcase_54 | AC | 31 ms
18,432 KB |
testcase_55 | AC | 35 ms
18,304 KB |
testcase_56 | AC | 31 ms
18,304 KB |
testcase_57 | AC | 32 ms
18,688 KB |
testcase_58 | AC | 33 ms
18,560 KB |
testcase_59 | AC | 32 ms
18,560 KB |
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.Globalization; using System.IO; using System.Text; using System.Linq; using E = System.Linq.Enumerable; internal partial class Solver { public void Run() { var n = ni(); var x = new int[n]; var y = new int[n]; for (int i = 0; i < n; i++) { x[i] = ni(); y[i] = ni(); } long ans = Solve(n, x, y); cout.WriteLine(ans); } class Angle : IComparable<Angle> { public long X { get; private set; } public long Y { get; private set; } private readonly long _a; private readonly long _b; public int Quadrant { get; private set; } public Angle(long x, long y) { _a = X = x; _b = Y = y; if (x == 0 && y == 0) throw new ArgumentException(); while (!(_a > 0 && _b >= 0)) { var t = _a; _a = _b; _b = -t; Quadrant++; } } public int CompareTo(Angle other) { var cmp = Quadrant.CompareTo(other.Quadrant); if (cmp != 0) return cmp; // b1/a1 < b2/a2 // b1*a2 < a1*b2 return (_b * other._a).CompareTo(other._b * _a); } } private long Solve(int n, int[] x, int[] y) { var angles = new List<Angle>(); for (int j = 0; j < n; j++) { var dx = x[j]; var dy = y[j]; angles.Add(new Angle(dx, dy)); } angles.Sort(); angles.AddRange(angles); //angles.Dump(); int right = 0; long ans = 1L * n * (n - 1) * (n - 2) / 6; long line = 0; for (int j = 0; j < n; j++) { var angle1 = angles[j]; while ( right + 1 < j + n && angle1.X * angles[right + 1].Y - angle1.Y * angles[right + 1].X >= 0) { right++; } var lower = right - j; ans -= 1L * lower * (lower - 1) / 2; } var hashSet = new Dictionary<Tuple<long, long>, int>(); for (int j = 0; j < n; j++) { var key = Normalize(angles[j].X, angles[j].Y); if (!hashSet.ContainsKey(key)) hashSet[key] = 0; hashSet[key]++; } for (int j = 0; j < n; j++) { var key = Normalize(-angles[j].X, -angles[j].Y); var num = 0; hashSet.TryGetValue(key, out num); line += 1L * num * (num - 1) / 2; } ans += line; return ans; } public static Tuple<long, long> Normalize(long x, long y) { var g = Gcd(Math.Abs(x), Math.Abs(y)); x /= g; y /= g; return Tuple.Create(x, y); } public static long Gcd(long s, long t) { return t != 0 ? Gcd(t, s % t) : s; } } // PREWRITEN CODE BEGINS FROM HERE internal partial class Solver : Scanner { public static void Main(string[] args) { #if LOCAL byte[] inputBuffer = new byte[1000000]; var inputStream = Console.OpenStandardInput(inputBuffer.Length); using (var reader = new StreamReader(inputStream, Console.InputEncoding, false, inputBuffer.Length)) { Console.SetIn(reader); new Solver(Console.In, Console.Out).Run(); } #else Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false }); new Solver(Console.In, Console.Out).Run(); Console.Out.Flush(); #endif } #pragma warning disable IDE0052 private readonly TextReader cin; private readonly TextWriter cout; #pragma warning restore IDE0052 public Solver(TextReader reader, TextWriter writer) : base(reader) { cin = reader; cout = writer; } public Solver(string input, TextWriter writer) : this(new StringReader(input), writer) { } #pragma warning disable IDE1006 #pragma warning disable IDE0051 private int ni() { return NextInt(); } private int[] ni(int n) { return NextIntArray(n); } private long nl() { return NextLong(); } private long[] nl(int n) { return NextLongArray(n); } private double nd() { return NextDouble(); } private double[] nd(int n) { return NextDoubleArray(n); } private string ns() { return Next(); } private string[] ns(int n) { return NextArray(n); } #pragma warning restore IDE1006 #pragma warning restore IDE0051 } internal static class LinqPadExtension { [Conditional("DEBUG")] public static void Dump<T>(this T obj) { #if DEBUG LINQPad.Extensions.Dump(obj); #endif } } public class Scanner { private readonly TextReader Reader; private readonly Queue<string> TokenQueue = new Queue<string>(); private readonly CultureInfo ci = CultureInfo.InvariantCulture; public Scanner() : this(Console.In) { } public Scanner(TextReader reader) { Reader = reader; } public int NextInt() { return int.Parse(Next(), ci); } public long NextLong() { return long.Parse(Next(), ci); } public double NextDouble() { return double.Parse(Next(), ci); } public string[] NextArray(int size) { string[] array = new string[size]; for (int i = 0; i < size; i++) { array[i] = Next(); } return array; } public int[] NextIntArray(int size) { int[] array = new int[size]; for (int i = 0; i < size; i++) { array[i] = NextInt(); } return array; } public long[] NextLongArray(int size) { long[] array = new long[size]; for (int i = 0; i < size; i++) { array[i] = NextLong(); } return array; } public double[] NextDoubleArray(int size) { double[] array = new double[size]; for (int i = 0; i < size; i++) { array[i] = NextDouble(); } return array; } public string Next() { if (TokenQueue.Count == 0) { if (!StockTokens()) { throw new InvalidOperationException(); } } return TokenQueue.Dequeue(); } public bool HasNext() { if (TokenQueue.Count > 0) { return true; } return StockTokens(); } private static readonly char[] _separator = new[] { ' ', '\t' }; private bool StockTokens() { while (true) { string line = Reader.ReadLine(); if (line == null) { return false; } string[] tokens = line.Split(_separator, StringSplitOptions.RemoveEmptyEntries); if (tokens.Length == 0) { continue; } foreach (string token in tokens) { TokenQueue.Enqueue(token); } return true; } } }