結果

問題 No.3011 品物の並び替え (Extra)
ユーザー 紙ぺーぱー紙ぺーぱー
提出日時 2015-05-04 00:18:28
言語 C#(csc)
(csc 3.9.0)
結果
WA  
実行時間 -
コード長 7,515 bytes
コンパイル時間 1,133 ms
コンパイル使用メモリ 113,152 KB
実行使用メモリ 24,960 KB
最終ジャッジ日時 2024-07-05 18:07:39
合計ジャッジ時間 4,778 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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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 WA -
testcase_01 WA -
testcase_02 WA -
testcase_03 WA -
testcase_04 AC 463 ms
24,832 KB
testcase_05 WA -
testcase_06 WA -
testcase_07 WA -
testcase_08 WA -
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 # 

using System;
using System.Linq;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using System.Diagnostics;
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>>());
            var RG = Enumerate(n, x => new List<KeyValuePair<int, int>>());
            for (int i = 0; i < m; i++)
            {
                var a = sc.Integer();
                var b = sc.Integer();
                var c = sc.Integer();
                G[a].Add(new KeyValuePair<int, int>(b, c));
                RG[b].Add(new KeyValuePair<int, int>(a, c));
            }
            int k;
            var scc = DSCCHelper.SCC(G, RG, out k);
            var group = Enumerate(k, x => new List<int>());
            for (int i = 0; i < scc.Length; i++)
                group[scc[i]].Add(i);
            var max = 0;
            var ans = new List<int>();
            var plus = 0;
            var rand = new Random();
            for (int i = 0; i < k; i++)
            {
                foreach (var x in group[i])
                    foreach (var kv in G[x])
                        if (scc[kv.Key] != i)
                            plus += kv.Value;
                var ord = group[i].OrderBy(x => rand.Next()).ToArray();
                var maxval = 0;
                var maxlist = new int[0];
                for (int _ = 0; _ < 10000; _++)
                {
                    var x = rand.Next() % ord.Length;
                    var y = rand.Next() % ord.Length;
                    Swap(ref ord[x], ref ord[y]);
                    var visit = new HashSet<int>();
                    var val = 0;
                    foreach (var p in ord)
                    {
                        visit.Add(p);
                        foreach (var kv in G[p])
                        {
                            if (!visit.Contains(kv.Key))
                                val += kv.Value;
                        }
                    }
                    if (val > maxval)
                    {
                        maxval = val;
                        maxlist = ord.ToArray();
                    }
                }
                max += maxval;
                foreach (var y in maxlist)
                    ans.Add(y);
            }
            IO.Printer.Out.WriteLine(max + plus);
            IO.Printer.Out.WriteLine(ans.AsJoinedString());
        }
        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 DecomposiitonOfStronglyConnectedComponents
static public class DSCCHelper
{
    static public int[] SCC(List<KeyValuePair<int, int>>[] G, List<KeyValuePair<int, int>>[] RG, out int k)
    {
        var n = G.Length;
        var used = new bool[n];
        var vs = new List<int>(n);
        var cmp = new int[n];
        Action<int> dfs = null;
        dfs = v =>
        {
            used[v] = true;
            foreach (var to in G[v])
                if (!used[to.Key]) dfs(to.Key);
            vs.Add(v);
        };
        Action<int, int> rdfs = null;
        rdfs = (v, t) =>
        {
            used[v] = true;
            cmp[v] = t;
            foreach (var to in RG[v])
                if (!used[to.Key]) rdfs(to.Key, t);
        };

        for (int i = 0; i < used.Length; i++)
            if (!used[i]) dfs(i);
        used = new bool[n];
        k = 0;
        for (int i = vs.Count - 1; i >= 0; i--)
            if (!used[vs[i]]) rdfs(vs[i], k++);
        return cmp;

    }
}
#endregion

#region HashMap
class HashMap<K, V> : Dictionary<K, V>
{
    new public V this[K i]
    {
        get
        {
            V v;
            return TryGetValue(i, out v) ? v : base[i] = default(V);
        }
        set { base[i] = value; }
    }
}
#endregion
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