結果
| 問題 |
No.1031 いたずら好きなお姉ちゃん
|
| コンテスト | |
| ユーザー |
紙ぺーぱー
|
| 提出日時 | 2020-04-17 21:56:05 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 144 ms / 3,500 ms |
| コード長 | 3,837 bytes |
| コンパイル時間 | 3,156 ms |
| コンパイル使用メモリ | 116,840 KB |
| 実行使用メモリ | 26,240 KB |
| 最終ジャッジ日時 | 2024-10-03 12:48:16 |
| 合計ジャッジ時間 | 11,126 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 53 |
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.Linq;
using System.Collections.Generic;
using System.Diagnostics;
using Debug = System.Diagnostics.Trace;
using SB = System.Text.StringBuilder;
using static System.Math;
using Number = System.Int64;
using static System.Numerics.BigInteger;
namespace Program {
public class Solver {
Random rnd = new Random(0);
public void Solve() {
var n = ri;
var a = Enumerate(n, x => ri);
var ans = 0L;
ans += f(n, a);
Array.Reverse(a);
ans += f(n, a);
Console.WriteLine(ans);
}
long f(int n, int[] a) {
Debug.WriteLine("---");
Debug.WriteLine(a.AsJoinedString());
var max = new List<int>();
var min = new List<int>();
var ret = 0L;
for (int i = 0; i < n; i++) {
while (max.Any() && a[max.Last()] < a[i]) max.RemoveAt(max.Count - 1);
while (min.Any() && a[min.Last()] > a[i]) min.RemoveAt(min.Count - 1);
max.Add(i);
var l = min.Any() ? min.Last() : -1;
var id = ~max.BinarySearch(l);
ret += max.Count - 1 - id;
min.Add(i);
}
return ret;
}
const long INF = 1L << 60;
static int[] dx = { -1, 0, 1, 0 };
static int[] dy = { 0, 1, 0, -1 };
int ri { get { return sc.Integer(); } }
long rl { get { return sc.Long(); } }
double rd { get { return sc.Double(); } }
string rs { get { return sc.Scan(); } }
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 < a.Length; ++i) a[i] = f(i); return a;
}
static T[][] Enumerate<T>(int n, int m, Func<int, int, T> f) {
return Enumerate(n, x => Enumerate(m, y => f(x, y)));
}
static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
}
}
#region main
static class Ex {
static public string AsString(this IEnumerable<char> ie) { return new string(ie.ToArray()); }
static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") {
return string.Join(st, ie);
}
static public void Main() {
Console.SetOut(new Program.IO.Printer(Console.OpenStandardOutput()) { AutoFlush = false });
var solver = new Program.Solver();
var t = new System.Threading.Thread(solver.Solve, 100000000);
t.Start();
t.Join();
//*/
//solver.Solve();
Console.Out.Flush();
}
}
#endregion
#region Ex
namespace Program.IO {
using System.IO;
using System.Text;
using System.Globalization;
public class Printer : StreamWriter {
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
}
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) && !isEof);
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 string ScanLine() {
var sb = new StringBuilder();
for (var b = Char(); b != '\n' && b != 0; b = (char)read()) if (b != '\r') sb.Append(b);
return sb.ToString();
}
public long Long() { return isEof ? long.MinValue : long.Parse(Scan()); }
public int Integer() { return isEof ? int.MinValue : int.Parse(Scan()); }
public double Double() { return isEof ? double.NaN : double.Parse(Scan(), CultureInfo.InvariantCulture); }
}
}
#endregion
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