#149093 (C#(csc)) No.482 あなたの名は

• 問題: No.482 あなたの名は
• ユーザー: claw88
• 提出日時: 2017-02-10 22:47:20
• 言語: C#(csc) (csc 3.9.0)
• 結果: AC
• 実行時間: 118 ms / 2,000 ms
• コード長: 2,388 bytes
• コンパイル時間: 1,962 ms
• コンパイル使用メモリ: 111,704 KB
• 実行使用メモリ: 37,760 KB
• 最終ジャッジ日時: 2024-12-29 20:17:14
• 合計ジャッジ時間: 4,493 ms
• ジャッジサーバーID （参考情報）: judge2 / judge5

ファイルパターン	結果
sample	AC * 3
other	AC * 28

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

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using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Globalization;
using System.Diagnostics;
using static System.Console;
using Pair = System.Collections.Generic.KeyValuePair<int, int>;
class Program
{
    static void Main()
    {
        //SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
        new Program().Solve();
        //Out.Flush();
    }
    Scanner cin = new Scanner();
    readonly int[] dd = { 0, 1, 0, -1, 0 };
    readonly int mod = 1000000007;
    readonly string alfa = "abcdefghijklmnopqrstuvwxyz";
    void Solve()
    {
        int N = cin.Nextint;
        var K = cin.Nextlong;
        var D = cin.Scanint.Select(i => i - 1).ToArray();
  
        var C = new bool[N];
        int cnt = 0; //動かす回数
        for (int i = 0; i < N; i++)
        {
            if (C[i] || D[i] == i) continue;
            var v = D[i];
            while (true)
            {
                C[v] = true;
                cnt++;
                if (D[v] == i) break;
                v = D[v];              
            }
        }
        //Console.WriteLine(cnt);
        if (K  < cnt)
        {
            WriteLine("NO");
        }
        else
        {
            K -= cnt;
            if (K % 2 == 0)
            {
                WriteLine("YES");
            }
            else
            {
                WriteLine("NO");
            }
        }
    }
}
class Scanner
{
    string[] s; int i;
    char[] cs = new char[] { ' ' };
    public Scanner() { s = new string[0]; i = 0; }
    public string[] Scan { get { return ReadLine().Split(); } }
    public int[] Scanint { get { return Array.ConvertAll(Scan, int.Parse); } }
    public long[] Scanlong { get { return Array.ConvertAll(Scan, long.Parse); } }
    public double[] Scandouble { get { return 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 { get { return int.Parse(Next); } }
    public long Nextlong { get { return long.Parse(Next); } }
    public double Nextdouble { get { return double.Parse(Next); } }
}
 
 
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