#91923 (C#(csc)) No.371 ぼく悪いプライムじゃないよ

• 問題: No.371 ぼく悪いプライムじゃないよ
• ユーザー: 紙ぺーぱー
• 提出日時: 2016-05-14 01:23:28
• 言語: C#(csc) (csc 3.9.0)
• 結果: AC
• 実行時間: 35 ms / 1,000 ms
• コード長: 5,705 bytes
• コンパイル時間: 923 ms
• コンパイル使用メモリ: 120,864 KB
• 実行使用メモリ: 27,144 KB
• 最終ジャッジ日時: 2024-06-09 19:20:16
• 合計ジャッジ時間: 3,534 ms
• ジャッジサーバーID （参考情報）: judge3 / judge4

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	32 ms; 24,956 KB
testcase_01	AC	30 ms; 22,836 KB
testcase_02	AC	31 ms; 24,836 KB
testcase_03	AC	31 ms; 25,112 KB
testcase_04	AC	31 ms; 25,084 KB
testcase_05	AC	32 ms; 24,832 KB
testcase_06	AC	31 ms; 24,976 KB
testcase_07	AC	31 ms; 25,088 KB
testcase_08	AC	32 ms; 24,576 KB
testcase_09	AC	33 ms; 27,008 KB
testcase_10	AC	32 ms; 24,576 KB
testcase_11	AC	32 ms; 27,020 KB
testcase_12	AC	33 ms; 24,844 KB
testcase_13	AC	34 ms; 24,956 KB
testcase_14	AC	34 ms; 26,872 KB
testcase_15	AC	32 ms; 27,144 KB
testcase_16	AC	34 ms; 24,704 KB
testcase_17	AC	34 ms; 25,092 KB
testcase_18	AC	32 ms; 24,828 KB
testcase_19	AC	32 ms; 24,832 KB
testcase_20	AC	32 ms; 25,088 KB
testcase_21	AC	32 ms; 24,972 KB
testcase_22	AC	32 ms; 25,088 KB
testcase_23	AC	33 ms; 24,960 KB
testcase_24	AC	33 ms; 25,084 KB
testcase_25	AC	33 ms; 25,092 KB
testcase_26	AC	32 ms; 25,088 KB
testcase_27	AC	32 ms; 24,960 KB
testcase_28	AC	31 ms; 24,836 KB
testcase_29	AC	31 ms; 24,828 KB
testcase_30	AC	33 ms; 23,052 KB
testcase_31	AC	32 ms; 22,784 KB
testcase_32	AC	32 ms; 24,844 KB
testcase_33	AC	34 ms; 24,968 KB
testcase_34	AC	33 ms; 24,960 KB
testcase_35	AC	34 ms; 27,008 KB
testcase_36	AC	32 ms; 24,964 KB
testcase_37	AC	32 ms; 25,084 KB
testcase_38	AC	35 ms; 26,884 KB
testcase_39	AC	33 ms; 24,964 KB
testcase_40	AC	32 ms; 22,924 KB
testcase_41	AC	32 ms; 26,880 KB
testcase_42	AC	31 ms; 24,852 KB
testcase_43	AC	32 ms; 24,828 KB
testcase_44	AC	33 ms; 25,212 KB
testcase_45	AC	33 ms; 24,836 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.Linq;
using System.Diagnostics;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Number = System.Int64;
using Point = System.Numerics.Complex;
namespace Program
{
    public class Solver
    {
        public void Solve()
        {
            var l = sc.Long();
            var h = sc.Long();
            var primes = MathEx.SieveList(100050);
            foreach (var p in primes.OrderByDescending(x => x))
            {
                var min = Math.Max(l, p * p);
                for (long v = (h / p) * p; v >= min; v -= p)
                {

                    var x = v;
                    var ok = true;
                    foreach (var q in primes)
                    {
                        if (q >= p) break;
                        if (x % q == 0) { ok = false; break; }
                    }
                    if (ok)
                    {
                        IO.Printer.Out.WriteLine(v);
                        return;
                    }
                }
            }
        }

        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 main
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
#region Ex
namespace 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, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
        public void WriteLine<T>(string format, 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 string ScanLine()
        {
            var sb = new StringBuilder();
            for (var b = Char(); b != '\n'; b = (char)read())
                if (b == 0) break;
                else if (b != '\r') 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 != 0 && b != '-' && (b < '0' || '9' < b));
            if (b == 0) return long.MinValue;
            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() { var s = Scan(); return s != "" ? double.Parse(s, CultureInfo.InvariantCulture) : double.NaN; }
        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); }
    }
}
#endregion
#region sieve list
static public partial class MathEx
{
    static public List<long> SieveList(int p)
    {
        var isPrime = new bool[p + 1];
        for (int i = 2; i <= p; i++)
            isPrime[i] = true;
        for (int i = 2; i * i <= p; i++)
        {
            if (!isPrime[i])
                continue;
            for (int j = i * i; j <= p; j += i)
                isPrime[j] = false;
        }
        var ret = new List<long>();
        for (int i = 0; i <= p; i++) if (isPrime[i]) ret.Add(i);
        return ret;
    }
}
#endregion