#210032 (C#(csc)) No.136 Yet Another GCD Problem

• 問題: No.136 Yet Another GCD Problem
• ユーザー: sekiya9311
• 提出日時: 2017-10-15 15:53:19
• 言語: C#(csc) (csc 3.9.0)
• 結果: AC
• 実行時間: 33 ms / 5,000 ms
• コード長: 6,163 bytes
• コンパイル時間: 2,509 ms
• コンパイル使用メモリ: 108,928 KB
• 実行使用メモリ: 18,048 KB
• 最終ジャッジ日時: 2024-11-17 17:45:58
• 合計ジャッジ時間: 5,085 ms
• ジャッジサーバーID （参考情報）: judge2 / judge4

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	24 ms; 17,920 KB
testcase_01	AC	23 ms; 18,048 KB
testcase_02	AC	25 ms; 17,920 KB
testcase_03	AC	28 ms; 17,792 KB
testcase_04	AC	31 ms; 17,792 KB
testcase_05	AC	26 ms; 17,920 KB
testcase_06	AC	26 ms; 17,920 KB
testcase_07	AC	26 ms; 18,048 KB
testcase_08	AC	28 ms; 17,920 KB
testcase_09	AC	25 ms; 17,920 KB
testcase_10	AC	28 ms; 18,048 KB
testcase_11	AC	29 ms; 17,792 KB
testcase_12	AC	24 ms; 17,792 KB
testcase_13	AC	29 ms; 18,048 KB
testcase_14	AC	33 ms; 18,048 KB
testcase_15	AC	31 ms; 17,792 KB
testcase_16	AC	29 ms; 18,048 KB
testcase_17	AC	29 ms; 18,048 KB
testcase_18	AC	24 ms; 18,048 KB
testcase_19	AC	30 ms; 17,664 KB
testcase_20	AC	28 ms; 17,792 KB
testcase_21	AC	25 ms; 17,920 KB
testcase_22	AC	24 ms; 17,920 KB
testcase_23	AC	26 ms; 18,048 KB
testcase_24	AC	25 ms; 17,792 KB
testcase_25	AC	25 ms; 17,792 KB
testcase_26	AC	26 ms; 17,920 KB
testcase_27	AC	31 ms; 17,792 KB
testcase_28	AC	29 ms; 17,920 KB
testcase_29	AC	25 ms; 17,920 KB
testcase_30	AC	24 ms; 17,920 KB
testcase_31	AC	25 ms; 17,792 KB
testcase_32	AC	25 ms; 18,048 KB
testcase_33	AC	25 ms; 17,920 KB
testcase_34	AC	27 ms; 18,048 KB
testcase_35	AC	28 ms; 18,048 KB
testcase_36	AC	26 ms; 17,920 KB
testcase_37	AC	32 ms; 17,920 KB
testcase_38	AC	24 ms; 17,920 KB
testcase_39	AC	26 ms; 18,048 KB
testcase_40	AC	26 ms; 17,920 KB
testcase_41	AC	25 ms; 17,920 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.Generic;
using System.Linq;
using System.Text;

namespace ProgrammingContest
{
    class MainClass : IDisposable
    {
        Scanner sc;
        Writer wr;
        string backPath = "..";
        char dirSep = System.IO.Path.DirectorySeparatorChar;
        string inFilePath = null;
        string outFilePath = null;
        public MainClass()
        {
            this.inFilePath = this.backPath
                            + this.dirSep
                            + this.backPath
                            + this.dirSep
                            + "in.txt";
            this.outFilePath = this.backPath
                             + this.dirSep
                             + this.backPath
                             + this.dirSep
                             + "out.txt";
        }
        static void Main(string[] args)
        {
            using (var mainClass = new MainClass())
            {
                //mainClass.MakeTestCase();
                mainClass.Solve();
            }
        }

        public void Dispose()
        {
            if (this.sc != null)
            {
                this.sc.Dispose();
                this.sc = null;
            }
            if (this.wr != null)
            {
                this.wr.Dispose();
                this.wr = null;
            }
        }

        void MakeTestCase()
        {
            Random rand = new Random();
            var res = new StringBuilder();



            using (var writer = new System.IO.StreamWriter(inFilePath))
                writer.Write(res.ToString());
        }

        void Solve()
        {
            this.wr = new Writer(this.isReactive);
            //this.wr = new Writer(this.outFilePath);
#if DEBUG
            if (!this.isReactive)
                this.sc = new Scanner(this.inFilePath);
            else
                this.sc = new Scanner();
#else
            this.sc = new Scanner();
#endif

            int N = sc.NextInt;
            int K = sc.NextInt;
            int ans = 1;
            for (int i = 2; i <= N / 2; i++)
            {
                ans = Math.Max(ans, (int)Gcd(i, N - i));
            }
            wr.WriteLine(ans);
        }

        long Gcd(long a, long b)
        {
            if (a < b)
            {
                long tmp = b;
                b = a;
                a = tmp;
            }
            long ret = 1;
            while (b != 0)
            {
                ret = b;
                b = a % b;
                a = ret;
            }
            return ret;
        }

        bool isReactive = false; // TODO: reactive check !!
    }

    class Writer : IDisposable
    {
        System.IO.TextWriter writer;
        StringBuilder sb;
        bool isReactive;
        public Writer(string path) : this(new System.IO.StreamWriter(path))
        {
        }
        public Writer(bool isReactive) : this(null, isReactive)
        {
        }
        public Writer(System.IO.TextWriter writer = null, bool isReactive = false)
        {
            this.writer = (writer ?? Console.Out);
            if (!(this.isReactive = isReactive))
            {
                this.sb = new StringBuilder();
            }
        }
        public void Dispose()
        {
            if (!isReactive)
                this.writer.Write(sb.ToString());
            if (!this.writer.Equals(Console.Out))
                this.writer.Dispose();
        }
        public void Write(object val)
        {
            if (this.isReactive)
            {
                this.writer.Write(val.ToString());
                this.writer.Flush();
            }
            else
                this.sb.Append(val.ToString());
        }
        public void Write(string format, params object[] vals)
        {
            if (this.isReactive)
            {
                this.writer.Write(format, vals);
                this.writer.Flush();
            }
            else
                this.sb.AppendFormat(format, vals);
        }
        public void WriteLine(object val)
        {
            this.Write(val.ToString() + System.Environment.NewLine);
        }
        public void WriteLine(string format, params object[] vals)
        {
            this.Write(format + System.Environment.NewLine, vals);
        }
    }

    class Scanner : IDisposable
    {
        Queue<string> buffer;
        char[] sep;
        System.IO.TextReader reader;
        public Scanner(string path) : this(new System.IO.StreamReader(path))
        {
        }
        public Scanner(System.IO.TextReader reader = null)
        {
            this.buffer = new Queue<string>();
            this.sep = new char[] { ' ' };
            this.reader = (reader ?? Console.In);
        }
        private void CheckBuffer()
        {
            if (this.buffer.Count == 0)
            {
                string str = null;
                while (string.IsNullOrEmpty(str))
                {
                    str = this.reader.ReadLine();
                }
                string[] strArray = str.Split(this.sep);
                foreach (string elStr in strArray)
                {
                    this.buffer.Enqueue(elStr);
                }
            }
        }

        public void Dispose()
        {
            if (!this.reader.Equals(Console.In))
                this.reader.Dispose();
        }

        public string Next
        {
            get
            {
                this.CheckBuffer();
                return this.buffer.Dequeue();
            }
        }

        public int NextInt
        {
            get
            {
                return int.Parse(this.Next);
            }
        }
        public double NextDouble
        {
            get
            {
                return double.Parse(this.Next);
            }
        }

        public long NextLong
        {
            get
            {
                return long.Parse(this.Next);
            }
        }
        public bool IsEmpty
        {
            get
            {
                this.CheckBuffer();
                return this.buffer.Count == 0;
            }
        }
    }
}