結果

問題 No.90 品物の並び替え
ユーザー 紙ぺーぱー
提出日時 2015-05-08 10:31:13
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 355 ms / 5,000 ms
コード長 5,756 bytes
コンパイル時間 980 ms
コンパイル使用メモリ 112,768 KB
実行使用メモリ 22,784 KB
最終ジャッジ日時 2024-07-05 20:15:48
合計ジャッジ時間 2,235 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge1
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 1
other AC * 9
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 #
プレゼンテーションモードにする

using System;
using System.Linq;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
namespace Program
{
    public class Solver
    {
        public void Solve()
        {
            var n = sc.Integer();
            var m = sc.Integer();
            var G = Enumerate(n, x => new List<KeyValuePair<int, int>>());
            for (int i = 0; i < m; i++)
            {
                var s = sc.Integer();
                var t = sc.Integer();
                var c = sc.Integer();
                G[s].Add(new KeyValuePair<int, int>(t, c));
            }
            var a = Enumerable.Range(0, n).ToArray();
            var max = 0;
            do
            {
                var sum = 0;
                var val = new int[n];
                for (int i = 0; i < n; i++)
                {
                    var p = a[i];
                    sum += val[p];
                    foreach (var x in G[p])
                        val[x.Key] += x.Value;           
                }
                max = Math.Max(sum, max);
                
            } while (a.NextPermutation(0, n));
            IO.Printer.Out.WriteLine(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 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, IEnumerable<T> source) { base.Write(format, source.OfType<object>().ToArray()); }
        public void WriteLine<T>(string format, IEnumerable<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); 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 long Long()
        {
            if (isEof) return long.MinValue;
            long ret = 0; byte b = 0; var ng = false;
            do b = read();
            while (b != '-' && (b < '0' || '9' < b));
            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() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }
        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); }
    }
}
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 next_permutation
static public partial class MathEx
{
    static public bool NextPermutation<T>(this T[] array, int first, int last) where T : IComparable<T>
    {
        if (first == last)
            return false;
        var i = last;
        if (--i == first)
            return false;
        while (true)
        {
            var ii = i--;
            if (array[i].CompareTo(array[ii]) < 0)
            {
                var j = last;
                while (array[i].CompareTo(array[--j]) >= 0) { }
                var temp = array[i];
                array[i] = array[j];
                array[j] = temp;
                Array.Reverse(array, ii, last - ii);
                return true;
            }
            if (i == first)
            {
                Array.Reverse(array, first, last - first);
                return false;
            }
        }
    }
}
#endregion
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