結果

問題 No.1267 Stop and Coin Game
ユーザー 👑 terry_u16terry_u16
提出日時 2020-10-23 23:11:27
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 282 ms / 2,000 ms
コード長 9,432 bytes
コンパイル時間 3,554 ms
コンパイル使用メモリ 110,616 KB
実行使用メモリ 24,436 KB
最終ジャッジ日時 2023-09-28 17:55:02
合計ジャッジ時間 10,257 ms
ジャッジサーバーID
（参考情報） 		judge15 / judge11
このコードへのチャレンジ
（要ログイン）

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 69 ms
21,916 KB
testcase_01 AC 70 ms
21,864 KB
testcase_02 AC 68 ms
21,668 KB
testcase_03 AC 68 ms
21,976 KB
testcase_04 AC 71 ms
23,832 KB
testcase_05 AC 70 ms
21,956 KB
testcase_06 AC 68 ms
21,780 KB
testcase_07 AC 68 ms
21,864 KB
testcase_08 AC 88 ms
21,836 KB
testcase_09 AC 68 ms
21,836 KB
testcase_10 AC 258 ms
20,488 KB
testcase_11 AC 118 ms
21,820 KB
testcase_12 AC 75 ms
21,864 KB
testcase_13 AC 66 ms
19,660 KB
testcase_14 AC 66 ms
21,880 KB
testcase_15 AC 69 ms
23,852 KB
testcase_16 AC 282 ms
22,344 KB
testcase_17 AC 70 ms
21,724 KB
testcase_18 AC 69 ms
21,776 KB
testcase_19 AC 66 ms
19,768 KB
testcase_20 AC 68 ms
19,704 KB
testcase_21 AC 68 ms
21,752 KB
testcase_22 AC 68 ms
21,784 KB
testcase_23 AC 68 ms
23,984 KB
testcase_24 AC 153 ms
21,940 KB
testcase_25 AC 181 ms
22,056 KB
testcase_26 AC 66 ms
21,884 KB
testcase_27 AC 73 ms
21,868 KB
testcase_28 AC 67 ms
21,856 KB
testcase_29 AC 67 ms
21,848 KB
testcase_30 AC 239 ms
24,436 KB
testcase_31 AC 70 ms
21,812 KB
testcase_32 AC 87 ms
21,956 KB
testcase_33 AC 151 ms
23,912 KB
testcase_34 AC 174 ms
23,912 KB
testcase_35 AC 239 ms
20,316 KB
testcase_36 AC 68 ms
21,712 KB
testcase_37 AC 95 ms
23,920 KB
testcase_38 AC 282 ms
22,400 KB
testcase_39 AC 79 ms
21,772 KB
testcase_40 AC 69 ms
23,828 KB
testcase_41 AC 82 ms
23,944 KB
testcase_42 AC 68 ms
21,772 KB
testcase_43 AC 97 ms
21,868 KB
testcase_44 AC 67 ms
21,956 KB
testcase_45 AC 69 ms
21,784 KB
testcase_46 AC 68 ms
21,872 KB
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 # 

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using YukicoderContest271.Extensions;
using YukicoderContest271.Questions;

namespace YukicoderContest271.Questions
{
    public class QuestionD : AtCoderQuestionBase
    {
        public override IEnumerable<object> Solve(TextReader inputStream)
        {
            var (n, volume) = inputStream.ReadValue<int, long>();
            var coins = inputStream.ReadLongArray();

            if (coins.Sum() <= volume)
            {
                yield return "Draw";
                yield break;
            }

            var firstWins = new bool[1 << n];

            for (int flag = (1 << n) - 1; flag >= 0; flag--)
            {
                long current = 0;
                for (int i = 0; i < coins.Length; i++)
                {
                    if (((flag >> i) & 1) > 0)
                    {
                        current += coins[i];
                    }
                }
                var isSenteFirst = PopCount(flag) % 2 == 0;

                if (current > volume)
                {
                    firstWins[flag] = isSenteFirst;
                }
                else
                {
                    var ok = false;
                    for (int c = 0; c < n; c++)
                    {
                        if (((flag >> c) & 1) == 0)
                        {
                            if (current + coins[c] > volume)
                            {
                                continue;
                            }

                            var next = flag | (1 << c);
                            if (firstWins[next] == isSenteFirst)
                            {
                                ok = true;
                                break;
                            }
                        }
                    }

                    if (ok)
                    {
                        firstWins[flag] = isSenteFirst;
                    }
                    else
                    {
                        firstWins[flag] = !isSenteFirst;
                    }
                }
            }

            yield return firstWins[0] ? "First" : "Second";
        }

        int PopCount(int n)
        {
            var count = 0;
            while (n > 0)
            {
                count += n & 1;
                n >>= 1;
            }
            return count;
        }
    }
}

namespace YukicoderContest271
{
    class Program
    {
        static void Main(string[] args)
        {
            IAtCoderQuestion question = new QuestionD();
            var answers = question.Solve(Console.In);

            var writer = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            Console.SetOut(writer);
            foreach (var answer in answers)
            {
                Console.WriteLine(answer);
            }
            Console.Out.Flush();
        }
    }
}

#region Base Class

namespace YukicoderContest271.Questions
{

    public interface IAtCoderQuestion
    {
        IEnumerable<object> Solve(string input);
        IEnumerable<object> Solve(TextReader inputStream);
    }

    public abstract class AtCoderQuestionBase : IAtCoderQuestion
    {
        public IEnumerable<object> Solve(string input)
        {
            var stream = new MemoryStream(Encoding.Unicode.GetBytes(input));
            var reader = new StreamReader(stream, Encoding.Unicode);

            return Solve(reader);
        }

        public abstract IEnumerable<object> Solve(TextReader inputStream);
    }
}

#endregion

#region Extensions

namespace YukicoderContest271.Extensions
{
    public static class StringExtensions
    {
        public static string Join<T>(this IEnumerable<T> source) => string.Concat(source);
        public static string Join<T>(this IEnumerable<T> source, char separator) => string.Join(separator, source);
        public static string Join<T>(this IEnumerable<T> source, string separator) => string.Join(separator, source);
    }

    public static class TextReaderExtensions
    {
        public static int ReadInt(this TextReader reader) => int.Parse(ReadString(reader));
        public static long ReadLong(this TextReader reader) => long.Parse(ReadString(reader));
        public static double ReadDouble(this TextReader reader) => double.Parse(ReadString(reader));
        public static string ReadString(this TextReader reader) => reader.ReadLine();

        public static int[] ReadIntArray(this TextReader reader, char separator = ' ') => ReadStringArray(reader, separator).Select(int.Parse).ToArray();
        public static long[] ReadLongArray(this TextReader reader, char separator = ' ') => ReadStringArray(reader, separator).Select(long.Parse).ToArray();
        public static double[] ReadDoubleArray(this TextReader reader, char separator = ' ') => ReadStringArray(reader, separator).Select(double.Parse).ToArray();
        public static string[] ReadStringArray(this TextReader reader, char separator = ' ') => reader.ReadLine().Split(separator);

        // Supports primitive type only.
        public static T1 ReadValue<T1>(this TextReader reader) => (T1)Convert.ChangeType(reader.ReadLine(), typeof(T1));

        public static (T1, T2) ReadValue<T1, T2>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            return (v1, v2);
        }

        public static (T1, T2, T3) ReadValue<T1, T2, T3>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
            return (v1, v2, v3);
        }

        public static (T1, T2, T3, T4) ReadValue<T1, T2, T3, T4>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
            var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
            return (v1, v2, v3, v4);
        }

        public static (T1, T2, T3, T4, T5) ReadValue<T1, T2, T3, T4, T5>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
            var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
            var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
            return (v1, v2, v3, v4, v5);
        }

        public static (T1, T2, T3, T4, T5, T6) ReadValue<T1, T2, T3, T4, T5, T6>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
            var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
            var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
            var v6 = (T6)Convert.ChangeType(inputs[5], typeof(T6));
            return (v1, v2, v3, v4, v5, v6);
        }

        public static (T1, T2, T3, T4, T5, T6, T7) ReadValue<T1, T2, T3, T4, T5, T6, T7>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
            var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
            var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
            var v6 = (T6)Convert.ChangeType(inputs[5], typeof(T6));
            var v7 = (T7)Convert.ChangeType(inputs[6], typeof(T7));
            return (v1, v2, v3, v4, v5, v6, v7);
        }

        public static (T1, T2, T3, T4, T5, T6, T7, T8) ReadValue<T1, T2, T3, T4, T5, T6, T7, T8>(this TextReader reader, char separator = ' ')
        {
            var inputs = ReadStringArray(reader, separator);
            var v1 = (T1)Convert.ChangeType(inputs[0], typeof(T1));
            var v2 = (T2)Convert.ChangeType(inputs[1], typeof(T2));
            var v3 = (T3)Convert.ChangeType(inputs[2], typeof(T3));
            var v4 = (T4)Convert.ChangeType(inputs[3], typeof(T4));
            var v5 = (T5)Convert.ChangeType(inputs[4], typeof(T5));
            var v6 = (T6)Convert.ChangeType(inputs[5], typeof(T6));
            var v7 = (T7)Convert.ChangeType(inputs[6], typeof(T7));
            var v8 = (T8)Convert.ChangeType(inputs[7], typeof(T8));
            return (v1, v2, v3, v4, v5, v6, v7, v8);
        }
    }
}

#endregion
0