#210555 (C#(csc)) No.72 そろばん Med

• 問題: No.72 そろばん Med
• ユーザー: sekiya9311
• 提出日時: 2017-10-18 23:38:09
• 言語: C#(csc) (csc 3.9.0)
• 結果: AC
• 実行時間: 71 ms / 5,000 ms
• コード長: 6,423 bytes
• コンパイル時間: 5,036 ms
• コンパイル使用メモリ: 112,012 KB
• 実行使用メモリ: 23,896 KB
• 最終ジャッジ日時: 2023-08-13 16:09:28
• 合計ジャッジ時間: 8,075 ms
• ジャッジサーバーID （参考情報）: judge10 / judge11

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	69 ms; 21,712 KB
testcase_01	AC	68 ms; 21,700 KB
testcase_02	AC	67 ms; 19,740 KB
testcase_03	AC	69 ms; 23,780 KB
testcase_04	AC	69 ms; 23,880 KB
testcase_05	AC	68 ms; 19,696 KB
testcase_06	AC	69 ms; 23,768 KB
testcase_07	AC	70 ms; 23,896 KB
testcase_08	AC	70 ms; 23,788 KB
testcase_09	AC	69 ms; 19,756 KB
testcase_10	AC	68 ms; 21,756 KB
testcase_11	AC	69 ms; 21,800 KB
testcase_12	AC	70 ms; 23,864 KB
testcase_13	AC	69 ms; 21,804 KB
testcase_14	AC	69 ms; 21,716 KB
testcase_15	AC	70 ms; 21,816 KB
testcase_16	AC	69 ms; 19,660 KB
testcase_17	AC	69 ms; 21,696 KB
testcase_18	AC	70 ms; 21,856 KB
testcase_19	AC	70 ms; 23,844 KB
testcase_20	AC	70 ms; 23,768 KB
testcase_21	AC	70 ms; 23,796 KB
testcase_22	AC	68 ms; 19,812 KB
testcase_23	AC	69 ms; 21,696 KB
testcase_24	AC	69 ms; 21,824 KB
testcase_25	AC	70 ms; 21,804 KB
testcase_26	AC	71 ms; 21,760 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();
            }
            if (this.wr != null)
            {
                this.wr.Dispose();
            }
        }

        void MakeTestCase()
        {
            Random rand = new Random();
            this.wr = new Writer(inFilePath);


        }

        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

            long n = sc.NextLong;
            System.Numerics.BigInteger bi = System.Numerics.BigInteger.Zero;
            long high = n, low = 0;
            while (high - low > 10)
            {
                long mid1 = (high + (low << 1)) / 3;
                long mid2 = ((high << 1) + low) / 3;
                if (Calc(mid1, n - mid1) <= Calc(mid2, n - mid2))
                {
                    low = mid1;
                }
                else
                {
                    high = mid2;
                }
            }
            System.Numerics.BigInteger ans = System.Numerics.BigInteger.Zero;
            for (long i = Math.Max(0, low - 100); i <= Math.Min(n, high + 100); i++)
            {
                var buf = Calc(i, n - i);
                if (ans < buf)
                    ans = buf;
            }
            wr.WriteLine(ans % MOD);
        }
        System.Numerics.BigInteger Calc(long x, long y)
        {
            return new System.Numerics.BigInteger(y) * (x + 1) + x;
        }
        const int MOD = (int) 1e6 + 7;
        bool isReactive = false; // TODO: reactive check !!
    }

    class Writer : IDisposable
    {
        private System.IO.TextWriter writer;
        private StringBuilder sb;
        private 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);
            this.isReactive = isReactive;
            if (!this.isReactive)
            {
                this.sb = new StringBuilder();
            }
        }
        public void Dispose()
        {
            if (!this.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
    {
        private Queue<string> buffer;
        private char[] sep;
        private 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 = string.Empty;
                while (string.IsNullOrEmpty(str))
                {
                    str = this.reader.ReadLine();
                }
                str.Split(this.sep).ToList()
                    .ForEach(el => this.buffer.Enqueue(el));
            }
        }

        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 IsEnd
        {
            get
            {
                this.CheckBuffer();
                return this.buffer.Count == 0;
            }
        }
    }
}