結果

問題 No.921 ずんだアロー
ユーザー claw88claw88
提出日時 2019-11-08 21:36:52
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 74 ms / 2,000 ms
コード長 3,698 bytes
コンパイル時間 1,022 ms
コンパイル使用メモリ 111,104 KB
実行使用メモリ 31,104 KB
最終ジャッジ日時 2024-09-15 01:17:03
合計ジャッジ時間 3,248 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
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 27 ms
18,560 KB
testcase_01 AC 26 ms
18,432 KB
testcase_02 AC 26 ms
18,688 KB
testcase_03 AC 26 ms
18,560 KB
testcase_04 AC 27 ms
18,560 KB
testcase_05 AC 26 ms
18,816 KB
testcase_06 AC 31 ms
19,072 KB
testcase_07 AC 31 ms
19,328 KB
testcase_08 AC 27 ms
18,560 KB
testcase_09 AC 26 ms
18,560 KB
testcase_10 AC 70 ms
30,208 KB
testcase_11 AC 73 ms
30,592 KB
testcase_12 AC 39 ms
21,988 KB
testcase_13 AC 61 ms
28,672 KB
testcase_14 AC 65 ms
29,440 KB
testcase_15 AC 49 ms
24,340 KB
testcase_16 AC 33 ms
19,840 KB
testcase_17 AC 67 ms
29,568 KB
testcase_18 AC 73 ms
30,720 KB
testcase_19 AC 73 ms
30,720 KB
testcase_20 AC 74 ms
31,104 KB
testcase_21 AC 73 ms
30,976 KB
testcase_22 AC 74 ms
30,720 KB
testcase_23 AC 74 ms
31,104 KB
testcase_24 AC 73 ms
30,848 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
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

diff # 

using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using SB = System.Text.StringBuilder;
//using System.Threading.Tasks;
//using System.Text.RegularExpressions;
//using System.Globalization;
//using System.Diagnostics;
using static System.Console;
using System.Numerics;
using static System.Math;
using pair = Pair<int, int>;

class Program
{
    static void Main()
    {
        //SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
        new Program().solve();
        Out.Flush();
    }
    readonly Scanner cin = new Scanner();
    readonly int[] dd = { 0, 1, 0, -1, 0 }; //→↓←↑
    readonly int mod = 1000000007;
    readonly int dom = 998244353;
    bool chmax<T>(ref T a, T b) where T : IComparable<T> { if (a.CompareTo(b) < 0) { a = b; return true; } return false; }
    bool chmin<T>(ref T a, T b) where T : IComparable<T> { if (b.CompareTo(a) < 0) { a = b; return true; } return false; }

    void solve()
    {
        int N = cin.nextint;
        var A = cin.scanlong;

        var dp = new long[2];
        dp[1] = 1;
        for (int i = 1; i < N; i++)
        {
            var next = new long[2];
            next[0] = Max(dp[0], dp[1]);
            if (A[i] == A[i - 1])
            {
                next[1] = next[0] + 1;
            }
            else
            {
                next[1] = dp[0] + 1;
            }
            dp = next;
        }
        WriteLine(dp.Max());
    }

}


static class Ex
{
    public static void join<T>(this IEnumerable<T> values, string sep = " ") => WriteLine(string.Join(sep, values));
    public static string concat<T>(this IEnumerable<T> values) => string.Concat(values);
    public static string reverse(this string s) { var t = s.ToCharArray(); Array.Reverse(t); return t.concat(); }

    public static int lower_bound<T>(this IList<T> arr, T val) where T : IComparable<T>
    {
        int low = 0, high = arr.Count;
        int mid;
        while (low < high)
        {
            mid = ((high - low) >> 1) + low;
            if (arr[mid].CompareTo(val) < 0) low = mid + 1;
            else high = mid;
        }
        return low;
    }
    public static int upper_bound<T>(this IList<T> arr, T val) where T : IComparable<T>
    {
        int low = 0, high = arr.Count;
        int mid;
        while (low < high)
        {
            mid = ((high - low) >> 1) + low;
            if (arr[mid].CompareTo(val) <= 0) low = mid + 1;
            else high = mid;
        }
        return low;
    }
}

class Pair<T, U> : IComparable<Pair<T, U>> where T : IComparable<T> where U : IComparable<U>
{
    public T f; public U s;
    public Pair(T f, U s) { this.f = f; this.s = s; }
    public int CompareTo(Pair<T, U> a) => f.CompareTo(a.f) != 0 ? f.CompareTo(a.f) : s.CompareTo(a.s);
    public override string ToString() => $"{f} {s}";
}

class Scanner
{
    string[] s; int i;
    readonly char[] cs = new char[] { ' ' };
    public Scanner() { s = new string[0]; i = 0; }
    public string[] scan => ReadLine().Split();
    public int[] scanint => Array.ConvertAll(scan, int.Parse);
    public long[] scanlong => Array.ConvertAll(scan, long.Parse);
    public double[] scandouble => Array.ConvertAll(scan, double.Parse);
    public string next
    {
        get
        {
            if (i < s.Length) return s[i++];
            string st = ReadLine();
            while (st == "") st = ReadLine();
            s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
            i = 0;
            return next;
        }
    }
    public int nextint => int.Parse(next);
    public long nextlong => long.Parse(next);
    public double nextdouble => double.Parse(next);
}
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