結果

問題 No.390 最長の数列
ユーザー 紙ぺーぱー
提出日時 2016-07-08 22:37:23
言語 C#
(csc 3.100.19.26603)
結果
AC  
実行時間 1,708 ms
コード長 5,396 Byte
コンパイル時間 1,272 ms
使用メモリ 16,516 KB
最終ジャッジ日時 2019-09-28 16:21:30

テストケース

テストケース表示
入力 結果 実行時間
使用メモリ
00_sample01.txt AC 35 ms
10,788 KB
00_sample02.txt AC 34 ms
10,792 KB
00_sample03.txt AC 35 ms
10,784 KB
00_sample04.txt AC 34 ms
10,768 KB
10_hand01.txt AC 35 ms
10,788 KB
20_KO_biginput.txt AC 1,220 ms
16,504 KB
21_KO_complex.txt AC 1,708 ms
16,516 KB
30_hand02.txt AC 32 ms
10,684 KB
30_hand03.txt AC 32 ms
10,676 KB
30_hand04.txt AC 35 ms
10,744 KB
40_random01.txt AC 947 ms
16,508 KB
40_random02.txt AC 951 ms
16,504 KB
40_random03.txt AC 959 ms
16,504 KB
50_special01.txt AC 623 ms
15,924 KB
50_special02.txt AC 563 ms
16,508 KB
99_system_test1.txt AC 32 ms
10,684 KB
system_test1.txt AC 35 ms
10,784 KB
system_test2.txt AC 74 ms
10,808 KB
system_test3.txt AC 96 ms
10,804 KB
テストケース一括ダウンロード
コンパイルメッセージ
Microsoft (R) Visual C# Compiler version 3.100.19.26603 (9d80dea7)
Copyright (C) Microsoft Corporation. All rights reserved.

ソースコード

diff #
using System;
using System.Linq;
using System.Linq.Expressions;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
//using System.Numerics;
using Number = System.Int64;
namespace Program
{
    public class Solver
    {
        public void Solve()
        {
            var n = sc.Integer();
            var a = sc.Long(n);
            Array.Sort(a);
            var s = new HashSet<long>();
            foreach (var x in a) s.Add(x);
            var dp = new int[n];
            for (int i = 0; i < n; i++)
                dp[i] = 1;
            for (int i = n - 1; i >= 0; i--)
            {
                var x = a[i];
                for (long v = 1; v * v <= x; v++)
                {
                    if (x % v != 0) continue;
                    if (v < x && s.Contains(v))
                    {
                        var p = Array.BinarySearch(a, v);
                        dp[p] = Math.Max(dp[p], dp[i] + 1);
                    }
                    if (x / v < x && s.Contains(x / v))
                    {
                        var p = Array.BinarySearch(a, x / v);
                        dp[p] = Math.Max(dp[p], dp[i] + 1);
                    }
                }
                Debug.WriteLine(dp.AsJoinedString());

            }
            IO.Printer.Out.WriteLine(dp.Max());
        }
        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
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