#973942 (C#) No.2731 Two Colors

提出ソース

結果

問題	No.2731 Two Colors
ユーザー	crimsontea
提出日時	2024-04-19 21:48:16
言語	C# (.NET 8.0.203)
結果	AC
実行時間	1,439 ms / 3,000 ms
コード長	19,611 bytes
コンパイル時間	14,163 ms
コンパイル使用メモリ	165,900 KB
実行使用メモリ	196,516 KB
最終ジャッジ日時	2024-10-11 14:44:49
合計ジャッジ時間	25,032 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	AC	1,436 ms 59,392 KB
testcase_01	AC	1,439 ms 59,232 KB
testcase_02	AC	1,431 ms 59,388 KB
testcase_03	AC	68 ms 31,360 KB
testcase_04	AC	96 ms 37,248 KB
testcase_05	AC	94 ms 35,576 KB
testcase_06	AC	146 ms 43,772 KB
testcase_07	AC	135 ms 46,976 KB
testcase_08	AC	87 ms 34,928 KB
testcase_09	AC	281 ms 65,408 KB
testcase_10	AC	80 ms 33,792 KB
testcase_11	AC	437 ms 70,400 KB
testcase_12	AC	283 ms 61,696 KB
testcase_13	AC	372 ms 67,072 KB
testcase_14	AC	180 ms 54,528 KB
testcase_15	AC	88 ms 34,272 KB
testcase_16	AC	209 ms 50,812 KB
testcase_17	AC	250 ms 59,904 KB
testcase_18	AC	109 ms 37,376 KB
testcase_19	AC	222 ms 51,200 KB
testcase_20	AC	200 ms 59,648 KB
testcase_21	AC	113 ms 38,016 KB
testcase_22	AC	346 ms 67,680 KB
testcase_23	AC	151 ms 44,800 KB
testcase_24	AC	115 ms 38,784 KB
testcase_25	AC	66 ms 30,848 KB
testcase_26	AC	260 ms 61,696 KB
testcase_27	AC	321 ms 67,840 KB
testcase_28	AC	280 ms 64,128 KB
testcase_29	AC	143 ms 42,368 KB
testcase_30	AC	173 ms 51,584 KB
testcase_31	AC	160 ms 44,160 KB
testcase_32	AC	441 ms 67,168 KB
testcase_33	AC	63 ms 30,720 KB
testcase_34	AC	62 ms 30,720 KB
testcase_35	AC	63 ms 196,516 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

  復元対象のプロジェクトを決定しています...
  /home/judge/data/code/main.csproj を復元しました (103 ms)。
MSBuild のバージョン 17.9.6+a4ecab324 (.NET)
/home/judge/data/code/Main.cs(112,32): warning CS8632: '#nullable' 注釈コンテキスト内のコードでのみ、Null 許容参照型の注釈を使用する必要があります。 [/home/judge/data/code/main.csproj]
/home/judge/data/code/Main.cs(113,30): warning CS8632: '#nullable' 注釈コンテキスト内のコードでのみ、Null 許容参照型の注釈を使用する必要があります。 [/home/judge/data/code/main.csproj]
/home/judge/data/code/Main.cs(24,13): warning CS0219: 変数 'res' は割り当てられていますが、その値は使用されていません [/home/judge/data/code/main.csproj]
  main -> /home/judge/data/code/bin/Release/net8.0/main.dll
  main -> /home/judge/data/code/bin/Release/net8.0/publish/

ソースコード

raw source code

using A;
using System.Buffers;
using System.Collections;
using System.Diagnostics;
using System.Numerics;
using System.Runtime.CompilerServices;
using static A.InputUtility;
class Program
{
    static void Main()
    {
        using Output output = new(false);

        InputNewLine();
        var (h, w) = (NextInt32, NextInt32);

        int[][] a = new int[h][];
        for (int i = 0; i < a.Length; i++)
        {
            InputNewLine();
            a[i] = GetInt32Array();
        }

        int res = 0;
        var vec = new (int y, int x)[] {
            (1, 0),
            (0, 1),
            (-1, 0),
            (0, -1),
        };

        int[][] visited = new int[h][];
        for (int i = 0; i < visited.Length; i++)
        {
            visited[i] = Enumerable.Repeat(-1, w).ToArray();
        }

        PriorityQueue<(int y, int x), int> C = new();
        C.Enqueue((0, 0), 0);
        PriorityQueue<(int y, int x), int> D = new();
        D.Enqueue((h - 1, w - 1), 0);

        for (int i = 0; i < h * w + 2; i++)
        {
            if (i % 2 == 0)
            {
                while (C.Count > 0 && C.Dequeue() is (int y, int x))
                {
                    if (visited[y][x] == 0)
                    {
                        continue;
                    }
                    visited[y][x] = 0;

                    foreach (var (vy, vx) in vec)
                    {
                        var ny = y + vy;
                        var nx = x + vx;
                        if (0 > ny || ny >= h || 0 > nx || nx >= w) { continue; }
                        if (visited[ny][nx] == 1)
                        {
                            Console.WriteLine(i - 1);
                            return;
                        }
                        if (visited[ny][nx] != -1) { continue; }
                        C.Enqueue((ny, nx), a[ny][nx]);
                    }

                    break;
                }
            }
            else
            {
                while (D.Count > 0 && D.Dequeue() is (int y, int x))
                {
                    if (visited[y][x] == 1)
                    {
                        continue;
                    }
                    visited[y][x] = 1;

                    foreach (var (vy, vx) in vec)
                    {
                        var ny = y + vy;
                        var nx = x + vx;
                        if (0 > ny || ny >= h || 0 > nx || nx >= w) { continue; }
                        if (visited[ny][nx] == 0)
                        {
                            Console.WriteLine(i - 1);
                            return;
                        }
                        if (visited[ny][nx] != -1) { continue; }
                        D.Enqueue((ny, nx), a[ny][nx]);
                    }

                    break;
                }
            }
        }

        foreach (var row in visited)
        {
            Console.WriteLine(string.Join(' ', row));
        }
    }
}

namespace A
{
    public static class InputUtility
    {
        private static string[]? s_inputs;
        private static string? s_raw;
        private static int s_index = 0;

        private static void Init() => s_index = 0;
        public static int NextInt32 => int.Parse(s_inputs![s_index++]!);
        public static uint NextUInt32 => uint.Parse(s_inputs![s_index++]!);
        public static long NextInt64 => long.Parse(s_inputs![s_index++]!);
        public static ulong NextUInt64 => ulong.Parse(s_inputs![s_index++]!);
        public static string NextString => s_inputs![s_index++];
        public static char NextChar => s_inputs![s_index++][0];
        public static decimal NextDecimal => decimal.Parse(s_inputs![s_index++]!);
        public static BigInteger NextBigInteger => BigInteger.Parse(s_inputs![s_index++]!);
        public static int[] GetInt32Array() => s_inputs!.Select(int.Parse).ToArray();
        public static long[] GetInt64Array() => s_inputs!.Select(long.Parse).ToArray();
        public static string[] GetStringArray() => s_inputs!;
        public static string GetRawString() => s_raw!;
#if DEBUG
        private static TextReader? s_textReader;
        public static void SetSource(string path) => s_textReader = new StringReader(File.ReadAllText(path));
#endif
        public static bool InputNewLine()
        {
#if DEBUG
            if (s_textReader is TextReader sr)
            {
                Init();
                s_raw = sr.ReadLine()!;
                s_inputs = s_raw.Split(' ', StringSplitOptions.RemoveEmptyEntries);
                return true;
            }
#endif
            Init();
            s_raw = Console.ReadLine()!;
            s_inputs = s_raw.Split(' ', StringSplitOptions.RemoveEmptyEntries);
            return true;
        }
    }

    public static class CombinationFunction
    {
        public static void PartedRotate<T>(T[] a, int first1, int last1, int first2, int last2)
        {
            if (first1 == last1 || first2 == last2) return;
            int next = first2;
            while (first1 != next)
            {
                Swap(a, first1++, next++);
                if (first1 == last1) first1 = first2;
                if (next == last2)
                {
                    next = first2;
                }
                else if (first1 == first2)
                {
                    first2 = next;
                }
            }
        }

        public static bool NextCombinationImp<T>(T[] a, int first1, int last1, int first2, int last2) where T : IComparable<T>
        {
            if (first1 == last1 || first2 == last2) return false;
            int target = last1 - 1;
            int lastElem = last2 - 1;

            while (target != first1 && !(a[target].CompareTo(a[lastElem]) < 0)) target--;
            if (target == first1 && !(a[target].CompareTo(a[lastElem]) < 0))
            {
                PartedRotate(a, first1, last1, first2, last2);
                return false;
            }

            int next = first2;
            while (!(a[target].CompareTo(a[next]) < 0)) next++;
            Swap(a, target++, next++);
            PartedRotate(a, target, last1, next, last2);
            return true;
        }

        public static bool NextCombination<T>(T[] a, int first, int mid, int last) where T : IComparable<T>
            => NextCombinationImp(a, first, mid, mid, last);

        public static bool PrevCombination<T>(T[] a, int first, int mid, int last) where T : IComparable<T>
            => NextCombinationImp(a, mid, last, first, mid);

        public static void Swap<T>(T[] a, int i, int j) => (a[i], a[j]) = (a[j], a[i]);
    }

    public static class PermutationFunction
    {
        public static bool NextPermutation<T>(T[] a) where T : IComparable<T>
        {
            int n = a.Length;

            int i = n - 2;
            while (i >= 0 && a[i].CompareTo(a[i + 1]) >= 0) { i--; }

            if (i < 0) { return false; }

            int j = n - 1;
            while (a[j].CompareTo(a[i]) <= 0) { j--; }
            (a[i], a[j]) = (a[j], a[i]);

            Array.Reverse(a, i + 1, n - i - 1);

            return true;
        }

        public static bool NextPermutation<T>(Span<T> a) where T : IComparable<T>
        {
            int n = a.Length;

            int i = n - 2;
            while (i >= 0 && a[i].CompareTo(a[i + 1]) >= 0) { i--; }

            if (i < 0) { return false; }

            int j = n - 1;
            while (a[j].CompareTo(a[i]) <= 0) { j--; }
            (a[i], a[j]) = (a[j], a[i]);

            a.Slice(i + 1, n - i - 1).Reverse();
            return true;
        }
    }

    public readonly struct Output : IDisposable
    {
        private readonly StreamWriter _sw;
#if DEBUG
        public Output(string path)
        {
            var fs = new FileStream(path, FileMode.Create, FileAccess.Write);
            _sw = new StreamWriter(fs);
            Console.SetOut(_sw);
        }
#endif
        public Output(bool autoFlush)
        {
            _sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = autoFlush };
            Console.SetOut(_sw);
        }

        public void Dispose()
        {
            _sw.Dispose();
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        internal void Flush()
        {
            _sw.Flush();
        }
    }

    public static class ArrayExtensions
    {
        public static void Swap<T>(this T[] array, int i, int j) => (array[i], array[j]) = (array[j], array[i]);

        public static int LowerBound<T>(this T[] a, T target) where T : IComparable<T>
        {
            int ok = a.Length;
            int ng = -1;

            while (Math.Abs(ok - ng) > 1 && (ok + ng) / 2 is int mid)
                (ok, ng) = a[mid].CompareTo(target) >= 0 ? (mid, ng) : (ok, mid);

            return ok;
        }

        public static int UpperBound<T>(this T[] a, T target) where T : IComparable<T>
        {
            int ok = a.Length;
            int ng = -1;

            while (Math.Abs(ok - ng) > 1 && (ok + ng) / 2 is int mid)
                (ok, ng) = a[mid].CompareTo(target) > 0 ? (mid, ng) : (ok, mid);

            return ok;
        }

        public struct IndexedEnumerable<T> : IEnumerable<(T item, int index)>
        {
            private readonly T[] _a;
            private readonly int _startIndex;

            public IndexedEnumerable(T[] a, int startIndex = 0)
            {
                _a = a;
                _startIndex = startIndex;
            }

            public readonly IndexedEnumerator<T> GetEnumerator() => new IndexedEnumerator<T>(_a, _startIndex);
            IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
            IEnumerator<(T item, int index)> IEnumerable<(T item, int index)>.GetEnumerator() => GetEnumerator();
        }

        public struct IndexedEnumerator<T> : IEnumerator<(T item, int index)>
        {
            public readonly (T item, int index) Current => (_a[_index], _index + _startIndex);

            private int _index;
            private int _startIndex;
            private T[] _a;

            public IndexedEnumerator(T[] a, int startIndex)
            {
                _index = -1;
                _a = a;
                _startIndex = startIndex;
            }

            public bool MoveNext() => ++_index < _a.Length;
            readonly object IEnumerator.Current => Current;
            public readonly void Dispose() { }
            public void Reset() => _index = -1;
        }

        /// <returns>(T value, int index)</returns>
        public static IndexedEnumerable<T> Enumerate<T>(this T[] arr, int startIndex = 0) => new IndexedEnumerable<T>(arr, startIndex);
    }

    public static class IEnumerableExtensions
    {
        public static IEnumerable<TSource> Log<TSource>(this IEnumerable<TSource> source)
        {
            Console.WriteLine(string.Join(' ', source));
            return source;
        }

        public static ScanEnumerable<TSource, TAccumulate> Scan<TSource, TAccumulate>(
            this IEnumerable<TSource> source,
            TAccumulate seed,
        Func<TAccumulate, TSource, TAccumulate> accumulator) where TSource : struct where TAccumulate : struct
        {
            return new ScanEnumerable<TSource, TAccumulate>(source, accumulator, seed);
        }

        public static IEnumerable<TAccumulate> ScanExSeed<TSource, TAccumulate>(
            this IEnumerable<TSource> source,
            TAccumulate seed,
            Func<TAccumulate, TSource, TAccumulate> accumulator)
        {
            var accumulation = new List<TAccumulate>();

            var current = seed;
            foreach (var item in source)
            {
                current = accumulator(current, item);
                accumulation.Add(current);
            }

            return accumulation;
        }

        public readonly struct ScanEnumerable<TSource, TAccumulate> : IEnumerable<TAccumulate> where TSource : struct where TAccumulate : struct
        {
            private readonly IEnumerable<TSource> _source;
            private readonly Func<TAccumulate, TSource, TAccumulate> _accumulator;
            private readonly TAccumulate _seed;

            public ScanEnumerable(IEnumerable<TSource> source, Func<TAccumulate, TSource, TAccumulate> accumulator, TAccumulate seed)
            {
                _source = source;
                _accumulator = accumulator;
                _seed = seed;
            }

            public readonly ScanEnumerator<TSource, TAccumulate> GetEnumerator() => new(_source, _accumulator, _seed);
            readonly IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
            readonly IEnumerator<TAccumulate> IEnumerable<TAccumulate>.GetEnumerator() => GetEnumerator();
        }

        public struct ScanEnumerator<TSource, TAccumulate> : IEnumerator<TAccumulate> where TSource : struct where TAccumulate : struct
        {
            private readonly Func<TAccumulate, TSource, TAccumulate> _accumulator;

            private readonly IEnumerator<TSource> _enumerator;
            private TAccumulate _current;

            private bool _secondOrLaterElement = false;

            public ScanEnumerator(IEnumerable<TSource> source, Func<TAccumulate, TSource, TAccumulate> accumulator, TAccumulate seed)
            {
                _enumerator = source.GetEnumerator();
                _accumulator = accumulator;

                _current = seed;
            }

            public readonly TAccumulate Current => _current;
            readonly object IEnumerator.Current => Current;

            public readonly void Dispose() { }

            public bool MoveNext()
            {
                if (_secondOrLaterElement)
                {
                    if (_enumerator.MoveNext())
                    {
                        _current = _accumulator(_current, _enumerator.Current);
                        return true;
                    }
                    return false;
                }
                else
                {
                    _secondOrLaterElement = true;
                    return true;
                }
            }

            public void Reset()
            {
                throw new NotSupportedException();
            }
        }

        public static IEnumerable<TSource> Scan<TSource>(
            this IEnumerable<TSource> source,
            Func<TSource, TSource, TSource> accumulator)
        {
            if (source is null)
                throw new ArgumentNullException(paramName: nameof(source));

            if (accumulator is null)
                throw new ArgumentNullException(paramName: nameof(accumulator));

            var accumulation = new List<TSource>();

            if (source.Any() is false)
            {
                return accumulation;
            }

            var current = source.First();
            accumulation.Add(current);

            foreach (var item in source.Skip(1))
            {
                current = accumulator(current, item);
                accumulation.Add(current);
            }

            return accumulation;
        }

        public static CombinationEnumerable<T> Combination<T>(this T[] a, int k) where T : IComparable<T>
            => new(a, k);

        public readonly struct CombinationEnumerable<T> where T : IComparable<T>
        {
            private readonly T[] _a;
            private readonly int _k;

            public CombinationEnumerable(T[] a, int k)
            {
                _a = a;
                _k = k;
            }

            public readonly CombinationEnumerator<T> GetEnumerator() => new(_a, _k);
        }

        public struct CombinationEnumerator<T> : IEnumerator<ReadOnlyMemory<T>> where T : IComparable<T>
        {
            private readonly int _k;
            private readonly T[] _a;
            private readonly int _n;
            private bool _secondOrLaterElement = false;

            public CombinationEnumerator(T[] a, int k)
            {
                _a = a;
                _n = a.Length;
                _k = k;
            }

            public readonly ReadOnlyMemory<T> Current => _a.AsMemory()[.._k];
            readonly object IEnumerator.Current => Current;

            public readonly void Dispose() { }

            public bool MoveNext()
            {
                if (_secondOrLaterElement)
                {
                    return CombinationFunction.NextCombination(_a, 0, _k, _n);
                }
                else
                {
                    _secondOrLaterElement = true;
                    return true;
                }
            }

            public void Reset()
            {
                throw new NotSupportedException();
            }
        }

        public static PermutationEnumerable<T> Permutation<T>(this T[] a) where T : IComparable<T> => new(a);
        public static PermutationEnumerable<T> Permutation<T>(this Span<T> a) where T : IComparable<T> => new(a);

        public readonly ref struct PermutationEnumerable<T> where T : IComparable<T>
        {
            private readonly Span<T> _a;
            public PermutationEnumerable(T[] a) => _a = a;
            public PermutationEnumerable(Span<T> a) => _a = a;
            public readonly PermutationEnumerator<T> GetEnumerator() => new(_a);
        }

        public ref struct PermutationEnumerator<T> where T : IComparable<T>
        {
            private readonly Span<T> _a;
            private readonly int _n;
            private bool _secondOrLaterElement = false;

            public PermutationEnumerator(T[] a)
            {
                _a = a;
                _n = a.Length;
            }

            public PermutationEnumerator(Span<T> a)
            {
                _a = a;
                _n = a.Length;
            }

            public readonly ReadOnlyMemory<T> Current => _a.ToArray().AsMemory()[..];

            public readonly void Dispose() { }

            public bool MoveNext()
            {
                if (_secondOrLaterElement)
                {
                    return PermutationFunction.NextPermutation(_a);
                }
                else
                {
                    _secondOrLaterElement = true;
                    return true;
                }
            }

            public void Reset() => throw new NotSupportedException();
        }
    }

    public class MyMath
    {
        public static long Pow(long x, int y) => Enumerable.Repeat(x, y).Aggregate(1L, (acc, x) => acc * x);
        public static long Pow10(int y) => Pow(10, y);
        public static long Pow2(int y) => Pow(2, y);
        public static long Gcd(long a, long b) => b == 0 ? a : Gcd(b, a % b);
        public static long Lcm(long a, long b) => a / Gcd(a, b) * b;
    }

    public class MyMathBigInteger
    {
        public static BigInteger Pow(long x, int y) => Enumerable.Repeat(x, y).Aggregate(new BigInteger(1), (acc, x) => acc * x);
        public static BigInteger Pow10(int y) => Pow(10, y);
        public static BigInteger Pow2(int y) => Pow(2, y);
    }
}
#region Expanded by https://github.com/kzrnm/SourceExpander
namespace SourceExpander{public class Expander{[Conditional("EXP")]public static void Expand(string inputFilePath=null,string outputFilePath=null,bool ignoreAnyError=true){}public static string ExpandString(string inputFilePath=null,bool ignoreAnyError=true){return "";}}}
#endregion Expanded by https://github.com/kzrnm/SourceExpander

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結果

テストケース

コンパイルメッセージ

ソースコード