#392677 (C#(csc)) No.875 Range Mindex Query

• 問題: No.875 Range Mindex Query
• ユーザー: sekiya9311
• 提出日時: 2019-10-24 23:46:21
• 言語: C#(csc) (csc 3.9.0)
• 結果: AC
• 実行時間: 454 ms / 2,000 ms
• コード長: 9,068 bytes
• コンパイル時間: 969 ms
• コンパイル使用メモリ: 118,536 KB
• 実行使用メモリ: 38,528 KB
• 最終ジャッジ日時: 2024-07-18 08:25:07
• 合計ジャッジ時間: 6,223 ms
• ジャッジサーバーID （参考情報）: judge1 / judge2

ファイルパターン	結果
sample	AC * 1
other	AC * 18

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

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;

namespace ProgrammingContestTemplateByDotNetCore
{

    #region "Input and Output Classes"

    class Scanner : IDisposable
    {
        private readonly Queue<string> _buffer;
        private readonly char[] _sep;
        private readonly TextReader _reader;

        public Scanner(TextReader reader = null, char[] sep = null)
        {
            _buffer = new Queue<string>();
            _sep = sep ?? new[] { ' ' };
            _reader = reader ?? Console.In;
        }

        public Scanner(string path, char[] sep = null)
            : this(new StreamReader(path), sep) { }

        private void CheckBuffer()
        {
            if (_buffer.Any() || _reader.Peek() == -1)
                return;

            string str = string.Empty;
            for (;
                string.IsNullOrWhiteSpace(str);
                str = _reader.ReadLine()) { }

            var values = str.Split(_sep).Where(s => !string.IsNullOrWhiteSpace(s));
            foreach (var item in values)
            {
                _buffer.Enqueue(item);
            }
        }

        public string Next()
        {
            CheckBuffer();
            return _buffer.Dequeue();
        }
        public string[] GetStringArray(int count)
            => Enumerable.Range(0, count)
                .Select(e => Next())
                .ToArray();

        public int NextInt() => int.Parse(Next());
        public int[] GetIntArray(int count)
            => Enumerable.Range(0, count)
                .Select(e => NextInt())
                .ToArray();

        public long NextLong() => long.Parse(Next());
        public long[] GetLongArray(int count)
            => Enumerable.Range(0, count)
                .Select(e => NextLong())
                .ToArray();

        public double NextDouble() => double.Parse(Next());
        public double[] GetDoubleArray(int count)
            => Enumerable.Range(0, count)
                .Select(e => NextDouble())
                .ToArray();

        public decimal NextDecimal() => decimal.Parse(Next());
        public decimal[] GetDecimalArray(int count)
            => Enumerable.Range(0, count)
                .Select(e => NextDecimal())
                .ToArray();

        public BigInteger NextBigInt() => BigInteger.Parse(Next());
        public BigInteger[] GetBigIntArray(int count)
            => Enumerable.Range(0, count)
                .Select(e => NextBigInt())
                .ToArray();

        public bool IsEnd
        {
            get
            {
                CheckBuffer();
                return !_buffer.Any();
            }
        }

        public void Dispose()
        {
            if (!_reader.Equals(Console.In))
                _reader.Dispose();
        }
    }

    class Writer : IDisposable
    {
        private readonly TextWriter _writer;
        private readonly StringBuilder _cache;
        private readonly bool _isReactive;

        public Writer(TextWriter writer = null, bool isReactive = false)
        {
            _writer = writer ?? Console.Out;
            _isReactive = isReactive;
            if (!_isReactive)
                _cache = new StringBuilder();
        }

        public Writer(string path)
            : this(new StreamWriter(path)) { }

        public Writer(bool isReactive)
            : this(null, isReactive) { }

        public void Write(object value)
        {
            if (_isReactive)
            {
                _writer.Write(value);
                _writer.Flush();
            }
            else
            {
                _cache.Append(value);
            }
        }

        public void WriteFormat(string format, params object[] values)
        {
            var value = string.Format(format, values);
            Write(value);
        }

        public void WriteLine(object value = null)
        {
            Write($"{value}{Environment.NewLine}");
        }

        public void WriteLine(string format, params object[] values)
        {
            WriteFormat($"{format}{Environment.NewLine}", values);
        }

        public void Dispose()
        {
            if (!_isReactive)
            {
                _writer.Write(_cache);
                _writer.Flush();
            }
            if (!_writer.Equals(Console.Out))
            {
                _writer.Dispose();
            }
        }
    }

    public static class Extensions
    {
        public static void Set<TKey, TValue>(
            this IDictionary<TKey, TValue> source,
            TKey key, TValue value)
        {
            if (source.ContainsKey(key))
                source[key] = value;
            else
                source.Add(key, value);
        }


    }

#endregion

    class MainClass : IDisposable
    {
#region "Template"

        /// <summary> 入力を受け取る </summary>
        private readonly Scanner sc;
        /// <summary> 出力を行う </summary>
        private readonly Writer wr;
        private const string _inputFile = "input.txt";
        private const string _outFile = "output.txt";

        static void Main(string[] args)
        {
            using (new MainClass()) { }
        }

        public MainClass()
        {
            wr = new Writer(_isReactive);
            // TODO: ファイルに出力したい場合はこっち → wr = new Writer(_outFile);

#if DEBUG
            // 手元では、ファイルから入力を受け取る
            sc = new Scanner(_inputFile);
#else

            // 提出時、標準入力から受け取る
            sc = new Scanner();
#endif

            Solve();
        }

        public void Dispose()
        {
            sc?.Dispose();
            wr?.Dispose();
        }

        #endregion

        void Solve()
        {
            int N = sc.NextInt();
            int Q = sc.NextInt();
            SegmentTree tree = new SegmentTree(N);
            var a = sc.GetIntArray(N);
            for (int i = 0; i < N; i++)
            {
                tree.Update(i, a[i]);
            }

            for (int i = 0; i < Q; i++)
            {
                int id = sc.NextInt();
                int l = sc.NextInt() - 1;
                int r = sc.NextInt() - 1;
                if (id == 1)
                {
                    var leftVal = tree.Get(l, l + 1).Value;
                    var rightVal = tree.Get(r, r + 1).Value;
                    tree.Update(r, leftVal);
                    tree.Update(l, rightVal);
                }
                else
                {
                    var res = tree.Get(l, r + 1);
                    wr.WriteLine(res.Index + 1);
                }
            }
        }

        /// <summary>
        /// TODO: リアクティブ問題か否かを指定してね♪
        /// </summary>
        private const bool _isReactive = false;
    }

    class SegmentTree
    {
        public struct Pair
            : IComparable<Pair>
        {
            public int Value { get; set; }
            public int Index { get; }
            public Pair(int value, int index)
            {
                Value = value;
                Index = index;
            }

            public int CompareTo(Pair other)
                => Value.CompareTo(other.Value);
        }
        private Pair[] Data { get; }
        public int Size { get; }
        public readonly Pair Inf = new Pair((int)1e9, -1);

        public SegmentTree(int N)
        {
            Size = N;
            Data = Enumerable.Range(0, N << 2)
                .Select(i => new Pair(Inf.Value, i))
                .ToArray();
        }

        public void Update(int index, int value)
            => UpdateInternal(index, value, 0, 0, Size);
        private void UpdateInternal(int index, int value, int k, int L, int R)
        {
            if (index < L || R <= index)
                return;
            if (L + 1 == R && index == L)
            {
                Data[k] = new Pair(value, index);
                return;
            }

            var mid = (L + R) >> 1;
            UpdateInternal(index, value, (k << 1) + 1, L, mid);
            UpdateInternal(index, value, (k << 1) + 2, mid, R);

            var val = Min(Data[(k << 1) + 1], Data[(k << 1) + 2]);
            Data[k] = val;
        }

        public Pair Get(int l, int r) => GetInternal(l, r, 0, 0, Size);
        private Pair GetInternal(int l, int r, int k, int L, int R)
        {
            if (R <= l || r <= L)
                return Inf;
            if (l <= L && R <= r)
                return Data[k];

            var res = Inf;
            var mid = (L + R) >> 1;
            if (l < mid)
                res = Min(res, GetInternal(l, r, (k << 1) + 1, L, mid));
            if (mid < r)
                res = Min(res, GetInternal(l, r, (k << 1) + 2, mid, R));
            return res;
        }

        private Pair Min(Pair left, Pair right)
            => left.CompareTo(right) <= 0 ? left : right;
    }
}