結果

問題 No.1612 I hate Construct a Palindrome
ユーザー yupiteru_kunyupiteru_kun
提出日時 2021-07-21 22:37:41
言語 C#
(.NET 8.0.203)
結果
AC  
実行時間 474 ms / 2,000 ms
コード長 13,152 bytes
コンパイル時間 8,372 ms
コンパイル使用メモリ 147,728 KB
実行使用メモリ 160,804 KB
最終ジャッジ日時 2023-09-24 18:54:01
合計ジャッジ時間 18,224 ms
ジャッジサーバーID
（参考情報） 		judge13 / judge15
このコードへのチャレンジ（β）

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 AC 71 ms
28,116 KB
testcase_01 AC 74 ms
28,648 KB
testcase_02 AC 448 ms
94,204 KB
testcase_03 AC 71 ms
27,812 KB
testcase_04 AC 73 ms
30,732 KB
testcase_05 AC 448 ms
94,856 KB
testcase_06 AC 321 ms
73,876 KB
testcase_07 AC 320 ms
76,068 KB
testcase_08 AC 315 ms
74,864 KB
testcase_09 AC 268 ms
71,756 KB
testcase_10 AC 300 ms
73,616 KB
testcase_11 AC 267 ms
71,684 KB
testcase_12 AC 364 ms
77,956 KB
testcase_13 AC 318 ms
76,680 KB
testcase_14 AC 363 ms
77,960 KB
testcase_15 AC 460 ms
103,420 KB
testcase_16 AC 474 ms
103,548 KB
testcase_17 AC 428 ms
92,760 KB
testcase_18 AC 72 ms
28,716 KB
testcase_19 AC 74 ms
28,300 KB
testcase_20 AC 72 ms
28,412 KB
testcase_21 AC 74 ms
30,656 KB
testcase_22 AC 73 ms
28,724 KB
testcase_23 AC 71 ms
28,632 KB
testcase_24 AC 73 ms
28,956 KB
testcase_25 AC 75 ms
28,788 KB
testcase_26 AC 75 ms
30,876 KB
testcase_27 AC 71 ms
29,916 KB
testcase_28 AC 72 ms
27,992 KB
testcase_29 AC 61 ms
27,988 KB
testcase_30 AC 72 ms
27,756 KB
testcase_31 AC 73 ms
28,116 KB
testcase_32 AC 71 ms
27,776 KB
testcase_33 AC 72 ms
29,904 KB
testcase_34 AC 70 ms
29,960 KB
testcase_35 AC 70 ms
28,160 KB
testcase_36 AC 61 ms
27,824 KB
testcase_37 AC 71 ms
28,200 KB
testcase_38 AC 70 ms
160,804 KB
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
  Determining projects to restore...
  Restored /home/judge/data/code/main.csproj (in 119 ms).
.NET 向け Microsoft (R) Build Engine バージョン 17.0.0-preview-21470-01+cb055d28f
Copyright (C) Microsoft Corporation.All rights reserved.

  プレビュー版の .NET を使用しています。https://aka.ms/dotnet-core-preview をご覧ください
  main -> /home/judge/data/code/bin/Release/net6.0/main.dll
  main -> /home/judge/data/code/bin/Release/net6.0/publish/

ソースコード

diff # 

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using static System.Math;
using System.Text;
using System.Threading;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using Library;

namespace Program
{
    public static class ProblemC
    {
        static bool SAIKI = false;
        static public int numberOfRandomCases = 0;
        static public void MakeTestCase(List<string> _input, List<string> _output, ref Func<string[], bool> _outputChecker)
        {
        }
        static public void Solve()
        {
            var N = NN;
            var M = NN;
            var ABC = Repeat(0, M).Select(_ => new { A = NN - 1, B = NN - 1, C = NS[0] }).ToArray();
            if (ABC.Select(e => e.C).Distinct().Count() == 1) Console.WriteLine(-1);
            else
            {
                var path = Repeat(0, N).Select(_ => new List<(long idx, long node, char c)>()).ToArray();
                var ccnt = Repeat(0, N).Select(_ => new HashSet<char>()).ToArray();
                for (var j = 0; j < M; ++j)
                {
                    var item = ABC[j];
                    path[item.A].Add((j, item.B, item.C));
                    path[item.B].Add((j, item.A, item.C));
                    ccnt[item.A].Add(item.C);
                    ccnt[item.B].Add(item.C);
                }
                var left = 0L;
                var li = 0L;
                var right = 0L;
                var ri = 0L;
                for (var i = 0; i < N; ++i)
                {
                    if (ccnt[i].Count > 1)
                    {
                        var done = new bool[26];
                        var f = path[i].First();
                        done[f.c - 'a'] = true;
                        left = f.node;
                        li = f.idx;
                        foreach (var item in path[i])
                        {
                            if (done[item.c - 'a']) continue;
                            done[item.c - 'a'] = true;
                            right = item.node;
                            ri = item.idx;
                            break;
                        }
                        break;
                    }
                }
                Func<long, long, long, long, long[]> calc = (st, sti, go, goi) =>
                {
                    Action<long, long> dfs = null;
                    var stack = new Stack<long>();
                    var done = new bool[N];
                    var endend1 = false;
                    dfs = (node, parent) =>
                    {
                        if (endend1 || node == 0)
                        {
                            endend1 = true;
                            return;
                        }
                        if (done[node]) return;
                        done[node] = true;
                        foreach (var item in path[node])
                        {
                            if (item.node == parent) continue;
                            stack.Push(item.idx);
                            if (endend1 || item.node == 0)
                            {
                                endend1 = true;
                                return;
                            }
                            dfs(item.node, node);
                            if (endend1 || item.node == 0)
                            {
                                endend1 = true;
                                return;
                            }
                            stack.Pop();
                        }
                    };
                    dfs(st, -1);
                    Action<long, long> dfs2 = null;
                    var stack2 = new Stack<long>();
                    var done2 = new bool[N];
                    var endend = false;
                    dfs2 = (node, parent) =>
                    {
                        if (endend || node == N - 1)
                        {
                            endend = true;
                            return;
                        }
                        if (done2[node]) return;
                        done2[node] = true;
                        foreach (var item in path[node])
                        {
                            if (item.node == parent) continue;
                            stack2.Push(item.idx);
                            if (endend || item.node == N - 1)
                            {
                                endend = true;
                                return;
                            }
                            dfs2(item.node, node);
                            if (endend || item.node == N - 1)
                            {
                                endend = true;
                                return;
                            }
                            stack2.Pop();
                        }
                    };
                    dfs2(go, -1);
                    var ans1 = new List<long>();
                    foreach (var item in stack)
                    {
                        ans1.Add(item);
                    }
                    var ans2 = new List<long>();
                    foreach (var item in stack2)
                    {
                        ans2.Add(item);
                    }
                    ans2.Reverse();
                    var ans = new List<long>();
                    ans.AddRange(ans1);
                    ans.Add(sti);
                    ans.Add(goi);
                    ans.AddRange(ans2);
                    var ok = false;
                    for (var i = 0; i < ans.Count; ++i)
                    {
                        if (ABC[ans[i]].C != ABC[ans[ans.Count - 1 - i]].C)
                        {
                            ok = true;
                            break;
                        }
                    }
                    if (!ok)
                    {
                        var last = path[N - 1].First().idx;
                        ans.Add(last);
                        ans.Add(last);
                    }
                    return ans.ToArray();
                };
                var ret = calc(left, li, right, ri);
                if (ret.Length > 2 * N) ret = calc(right, ri, left, li);
                Console.WriteLine(ret.Length);
                foreach (var item in ret)
                {
                    Console.WriteLine(item + 1);
                }
            }
        }
        class Printer : StreamWriter
        {
            public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
            public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { base.AutoFlush = false; }
            public Printer(Stream stream, Encoding encoding) : base(stream, encoding) { base.AutoFlush = false; }
        }
        static LIB_FastIO fastio = new LIB_FastIODebug();
        static public void Main(string[] args) { if (args.Length == 0) { fastio = new LIB_FastIO(); Console.SetOut(new Printer(Console.OpenStandardOutput())); } if (SAIKI) { var t = new Thread(Solve, 134217728); t.Start(); t.Join(); } else Solve(); Console.Out.Flush(); }
        static long NN => fastio.Long();
        static double ND => fastio.Double();
        static string NS => fastio.Scan();
        static long[] NNList(long N) => Repeat(0, N).Select(_ => NN).ToArray();
        static double[] NDList(long N) => Repeat(0, N).Select(_ => ND).ToArray();
        static string[] NSList(long N) => Repeat(0, N).Select(_ => NS).ToArray();
        static long Count<T>(this IEnumerable<T> x, Func<T, bool> pred) => Enumerable.Count(x, pred);
        static IEnumerable<T> Repeat<T>(T v, long n) => Enumerable.Repeat<T>(v, (int)n);
        static IEnumerable<int> Range(long s, long c) => Enumerable.Range((int)s, (int)c);
        static IOrderedEnumerable<T> OrderByRand<T>(this IEnumerable<T> x) => Enumerable.OrderBy(x, _ => xorshift);
        static IOrderedEnumerable<T> OrderBy<T>(this IEnumerable<T> x) => Enumerable.OrderBy(x.OrderByRand(), e => e);
        static IOrderedEnumerable<T1> OrderBy<T1, T2>(this IEnumerable<T1> x, Func<T1, T2> selector) => Enumerable.OrderBy(x.OrderByRand(), selector);
        static IOrderedEnumerable<T> OrderByDescending<T>(this IEnumerable<T> x) => Enumerable.OrderByDescending(x.OrderByRand(), e => e);
        static IOrderedEnumerable<T1> OrderByDescending<T1, T2>(this IEnumerable<T1> x, Func<T1, T2> selector) => Enumerable.OrderByDescending(x.OrderByRand(), selector);
        static IOrderedEnumerable<string> OrderBy(this IEnumerable<string> x) => x.OrderByRand().OrderBy(e => e, StringComparer.OrdinalIgnoreCase);
        static IOrderedEnumerable<T> OrderBy<T>(this IEnumerable<T> x, Func<T, string> selector) => x.OrderByRand().OrderBy(selector, StringComparer.OrdinalIgnoreCase);
        static IOrderedEnumerable<string> OrderByDescending(this IEnumerable<string> x) => x.OrderByRand().OrderByDescending(e => e, StringComparer.OrdinalIgnoreCase);
        static IOrderedEnumerable<T> OrderByDescending<T>(this IEnumerable<T> x, Func<T, string> selector) => x.OrderByRand().OrderByDescending(selector, StringComparer.OrdinalIgnoreCase);
        static string Join<T>(this IEnumerable<T> x, string separator = "") => string.Join(separator, x);
        static uint xorshift { get { _xsi.MoveNext(); return _xsi.Current; } }
        static IEnumerator<uint> _xsi = _xsc();
        static IEnumerator<uint> _xsc() { uint x = 123456789, y = 362436069, z = 521288629, w = (uint)(DateTime.Now.Ticks & 0xffffffff); while (true) { var t = x ^ (x << 11); x = y; y = z; z = w; w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); yield return w; } }
        static bool Chmax<T>(this ref T lhs, T rhs) where T : struct, IComparable<T> { if (lhs.CompareTo(rhs) < 0) { lhs = rhs; return true; } return false; }
        static bool Chmin<T>(this ref T lhs, T rhs) where T : struct, IComparable<T> { if (lhs.CompareTo(rhs) > 0) { lhs = rhs; return true; } return false; }
        static void Fill<T>(this T[] array, T value) => array.AsSpan().Fill(value);
        static void Fill<T>(this T[,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0], array.Length).Fill(value);
        static void Fill<T>(this T[,,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0, 0], array.Length).Fill(value);
        static void Fill<T>(this T[,,,] array, T value) => MemoryMarshal.CreateSpan(ref array[0, 0, 0, 0], array.Length).Fill(value);
    }
}
namespace Library {
    class LIB_FastIO
    {
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public LIB_FastIO() { str = Console.OpenStandardInput(); }
        readonly Stream str;
        readonly byte[] buf = new byte[2048];
        int len, ptr;
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        byte read()
        {
            if (ptr >= len)
            {
                ptr = 0;
                if ((len = str.Read(buf, 0, 2048)) <= 0)
                {
                    return 0;
                }
            }
            return buf[ptr++];
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        char Char()
        {
            byte b = 0;
            do b = read();
            while (b < 33 || 126 < b);
            return (char)b;
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        virtual public string Scan()
        {
            var sb = new StringBuilder();
            for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
                sb.Append(b);
            return sb.ToString();
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        virtual public long Long()
        {
            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 << 3) + (ret << 1) + b - '0';
            }
        }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        virtual public double Double() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }
    }
    class LIB_FastIODebug : LIB_FastIO
    {
        Queue<string> param = new Queue<string>();
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        string NextString() { if (param.Count == 0) foreach (var item in Console.ReadLine().Split(' ')) param.Enqueue(item); return param.Dequeue(); }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public LIB_FastIODebug() { }
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public override string Scan() => NextString();
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public override long Long() => long.Parse(NextString());
        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        public override double Double() => double.Parse(NextString());
    }
}
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