結果
| 問題 |
No.878 Range High-Element Query
|
| コンテスト | |
| ユーザー |
keymoon
|
| 提出日時 | 2019-09-06 22:49:32 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 662 ms / 2,000 ms |
| コード長 | 2,805 bytes |
| コンパイル時間 | 1,401 ms |
| コンパイル使用メモリ | 117,092 KB |
| 実行使用メモリ | 38,656 KB |
| 最終ジャッジ日時 | 2024-06-24 20:20:24 |
| 合計ジャッジ時間 | 7,145 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| 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.IO;
using System.Net;
using System.Net.Sockets;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Numerics;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
using static System.Math;
using MethodImplOptions = System.Runtime.CompilerServices.MethodImplOptions;
using MethodImplAttribute = System.Runtime.CompilerServices.MethodImplAttribute;
public static class P
{
public static void Main()
{
var nq = Console.ReadLine().Split().Select(int.Parse).ToArray();
var n = nq[0];
var q = nq[1];
var a = Console.ReadLine().Split().Select(int.Parse).ToArray();
//Mo
#if DEBUG
var shiftRange = 1;
#else
var shiftRange = 8;
#endif
var chunkSize = 1 << shiftRange;
var res = new int[q];
var queries = Enumerable.Range(0, q).Select(Index => new { Index, Elem = Query.Parse(Console.ReadLine()) }).ToArray();
foreach (var query in queries.Where(x => chunkSize >= x.Elem.Length))
{
int count = 0;
int curMax = 0;
for (int i = query.Elem.L; i <= query.Elem.R; i++)
{
if (curMax < a[i])
{
curMax = a[i];
count++;
}
}
res[query.Index] = count;
}
foreach (var chunk in queries.Where(x => chunkSize < x.Elem.Length).GroupBy(x => x.Elem.L >> shiftRange))
{
List<int> highCand = new List<int>();
var chunkEnd = Min(n - 1, (chunk.Key + 1) << shiftRange);
highCand.Add(-1);
var curInd = chunkEnd;
foreach (var query in chunk.OrderBy(x => x.Elem.R))
{
while (curInd <= query.Elem.R)
{
if (highCand.Last() < a[curInd])
highCand.Add(a[curInd]);
curInd++;
}
int count = 0;
int curMax = 0;
for (int i = query.Elem.L; i < chunkEnd; i++)
{
if (curMax < a[i])
{
curMax = a[i];
count++;
}
}
res[query.Index] = count + highCand.Count - (~highCand.BinarySearch(curMax));
}
}
Console.WriteLine(string.Join("\n", res));
}
}
struct Query
{
public int L;
public int R;
public int Length => R - L + 1;
public static Query Parse(string s)
{
var qlr = s.Split().Select(int.Parse).ToArray();
return new Query()
{
L = qlr[1] - 1,
R = qlr[2] - 1,
};
}
}
keymoon