結果
問題 | No.153 石の山 |
ユーザー |
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提出日時 | 2015-05-12 14:11:26 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 26 ms / 5,000 ms |
コード長 | 5,268 bytes |
コンパイル時間 | 881 ms |
コンパイル使用メモリ | 112,000 KB |
実行使用メモリ | 19,584 KB |
最終ジャッジ日時 | 2024-10-14 14:34:28 |
合計ジャッジ時間 | 2,453 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 27 |
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 grundy = Enumerate(120, x => -1);Func<int, int> dfs = null;dfs = (m) =>{if (m <= 1)return grundy[m] = 0;if (grundy[m] >= 0) return grundy[m];var s = new HashSet<int>();if (m >= 2){var a = new int[] { m / 2, m / 2 };for (int i = 0; i < m % 2; i++)a[i]++;s.Add(dfs(a[0]) ^ dfs(a[1]));}if (m >= 3){var a = new int[] { m / 3, m / 3, m / 3 };for (int i = 0; i < m % 3; i++)a[i]++;s.Add(dfs(a[0]) ^ dfs(a[1]) ^ dfs(a[2]));}var ret = 0;while (true){if (s.Contains(ret))ret++;else return grundy[m] = ret;}};var ans = dfs(n);if (ans == 0)IO.Printer.Out.WriteLine("B");else IO.Printer.Out.WriteLine("A");}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();}}#endregion