結果
| 問題 |
No.921 ずんだアロー
|
| コンテスト | |
| ユーザー |
紙ぺーぱー
|
| 提出日時 | 2019-11-08 21:26:09 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 62 ms / 2,000 ms |
| コード長 | 3,938 bytes |
| コンパイル時間 | 1,139 ms |
| コンパイル使用メモリ | 111,488 KB |
| 実行使用メモリ | 23,496 KB |
| 最終ジャッジ日時 | 2024-09-15 01:11:25 |
| 合計ジャッジ時間 | 3,084 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 22 |
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
//author: camypaper
using System;
using System.Linq;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Debug = System.Diagnostics.Debug;
using SB = System.Text.StringBuilder;
using System.Numerics;
using Point = System.Numerics.Complex;
using static System.Math;
using Number = System.Int32;
using System.Runtime.CompilerServices;
namespace Program {
public class Solver {
Random rnd = new Random(0);
public void Solve() {
var n = ri;
var a = Enumerate(n, x => ri);
var dp = new int[2];
dp[1] = -100000000;
var prev = -1;
foreach (var x in a) {
var next = new int[2];
next[0] = Max(dp[0], dp[1]);
next[1] = dp[0] + 1;
if (x == prev) next[1] = Max(next[1], dp[1] + 1);
dp = next;
prev = x;
}
Console.WriteLine(dp.Max()); ;
}
const long INF = 1L << 60;
int ri => sc.Integer();
long rl => sc.Long();
double rd => sc.Double();
string rs => sc.Scan();
public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
static IEnumerable<int> Rep(int n) => Enumerable.Range(0, n);
static IEnumerable<int> RRep(int n) => Enumerable.Range(0, n).Reverse();
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 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();
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 => 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;
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
紙ぺーぱー