結果

問題 No.1340 おーじ君をさがせ
ユーザー りあんりあん
提出日時 2021-01-15 22:41:25
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 500 ms / 2,000 ms
コード長 7,487 bytes
コンパイル時間 2,266 ms
コンパイル使用メモリ 116,224 KB
実行使用メモリ 23,040 KB
最終ジャッジ日時 2024-11-27 23:15:13
合計ジャッジ時間 10,113 ms
ジャッジサーバーID
（参考情報） 		judge2 / 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 23 ms
19,072 KB
testcase_01 AC 23 ms
18,944 KB
testcase_02 AC 23 ms
19,072 KB
testcase_03 AC 28 ms
18,688 KB
testcase_04 AC 25 ms
18,944 KB
testcase_05 AC 24 ms
18,944 KB
testcase_06 AC 24 ms
18,944 KB
testcase_07 AC 24 ms
19,072 KB
testcase_08 AC 23 ms
18,944 KB
testcase_09 AC 25 ms
18,944 KB
testcase_10 AC 25 ms
19,072 KB
testcase_11 AC 96 ms
19,328 KB
testcase_12 AC 36 ms
18,944 KB
testcase_13 AC 88 ms
19,456 KB
testcase_14 AC 178 ms
19,712 KB
testcase_15 AC 148 ms
19,584 KB
testcase_16 AC 34 ms
19,072 KB
testcase_17 AC 67 ms
19,072 KB
testcase_18 AC 98 ms
19,456 KB
testcase_19 AC 27 ms
18,944 KB
testcase_20 AC 24 ms
19,072 KB
testcase_21 AC 120 ms
22,016 KB
testcase_22 AC 265 ms
21,376 KB
testcase_23 AC 121 ms
21,888 KB
testcase_24 AC 500 ms
20,992 KB
testcase_25 AC 41 ms
21,632 KB
testcase_26 AC 34 ms
20,736 KB
testcase_27 AC 31 ms
20,352 KB
testcase_28 AC 44 ms
21,632 KB
testcase_29 AC 30 ms
20,736 KB
testcase_30 AC 130 ms
22,144 KB
testcase_31 AC 500 ms
22,912 KB
testcase_32 AC 421 ms
23,040 KB
testcase_33 AC 385 ms
22,656 KB
testcase_34 AC 368 ms
22,912 KB
testcase_35 AC 446 ms
22,784 KB
testcase_36 AC 26 ms
18,944 KB
testcase_37 AC 33 ms
21,632 KB
testcase_38 AC 409 ms
22,912 KB
testcase_39 AC 134 ms
22,016 KB
testcase_40 AC 139 ms
22,272 KB
testcase_41 AC 138 ms
22,016 KB
testcase_42 AC 23 ms
19,200 KB
testcase_43 AC 24 ms
19,200 KB
testcase_44 AC 24 ms
18,816 KB
testcase_45 AC 25 ms
19,072 KB
testcase_46 AC 110 ms
20,096 KB
testcase_47 AC 119 ms
19,968 KB
testcase_48 AC 125 ms
19,968 KB
testcase_49 AC 119 ms
19,200 KB
testcase_50 AC 120 ms
19,584 KB
testcase_51 AC 118 ms
19,328 KB
testcase_52 AC 197 ms
19,584 KB
testcase_53 AC 201 ms
19,584 KB
testcase_54 AC 196 ms
19,584 KB
testcase_55 AC 172 ms
19,968 KB
testcase_56 AC 24 ms
18,944 KB
testcase_57 AC 24 ms
19,072 KB
testcase_58 AC 23 ms
18,944 KB
testcase_59 AC 77 ms
19,072 KB
testcase_60 AC 23 ms
18,944 KB
testcase_61 AC 77 ms
19,072 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 System.Threading;
using System.Text;
using System.Text.RegularExpressions;
using System.Diagnostics;
using static util;
using P = pair<int, int>;

class Program {
    static void Main(string[] args) {
        var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
        var solver = new Solver(sw);
        // var t = new Thread(solver.solve, 1 << 28); // 256 MB
        // t.Start();
        // t.Join();
        solver.solve();
        sw.Flush();
    }
}

class Solver {
    StreamWriter sw;
    Scan sc;
    void Prt(string a) => sw.WriteLine(a);
    void Prt<T>(IEnumerable<T> a) => Prt(string.Join(" ", a));
    void Prt(params object[] a) => Prt(string.Join(" ", a));
    public Solver(StreamWriter sw) {
        this.sw = sw;
        this.sc = new Scan();
    }

    public void solve() {
        int n, m;
        long t;
        sc.Multi(out n, out m, out t);
        var mat = new bool[n][];
        for (int i = 0; i < n; i++)
        {
            mat[i] = new bool[n];
        }
        for (int i = 0; i < m; i++)
        {
            int u, v;
            sc.Multi(out u, out v);
            mat[u][v] = true;
        }
        Prt(pow(mat, t)[0].Count(x => x));
    }
    bool[][] mul(bool[][] A, bool[][] B) {
        int h = A.Length, w = B[0].Length;
        var res = new bool[h][];
        for (int i = 0; i < A.Length; i++)
        {
            res[i] = new bool[w];
            for (int j = 0; j < A[i].Length; j++)
            {
                for (int k = 0; k < B[j].Length; k++)
                {
                    res[i][k] |= A[i][j] && B[j][k];
                }
            }
        }
        return res;
    }
    bool[][] pow(bool[][] A, long k) {
        var res = new bool[A.Length][];
        for (int i = 0; i < A.Length; i++)
        {
            res[i] = new bool[A.Length];
            res[i][i] = true;
        }
        var a = mul(res, A);
        while (k > 0) {
            if ((k & 1) == 1) {
                res = mul(res, a);
            }
            a = mul(a, a);
            k >>= 1;
        }
        return res;
    }
}

class pair<T, U> : IComparable<pair<T, U>> {
    public T v1;
    public U v2;
    public pair() : this(default(T), default(U)) {}
    public pair(T v1, U v2) { this.v1 = v1; this.v2 = v2; }
    public int CompareTo(pair<T, U> a) {
        int c = Comparer<T>.Default.Compare(v1, a.v1);
        return c != 0 ? c : Comparer<U>.Default.Compare(v2, a.v2);
    }
    public override string ToString() => v1 + " " + v2;
    public void Deconstruct(out T a, out U b) { a = v1; b = v2; }
}
static class util {
    public static readonly int M = 1000000007;
    // public static readonly int M = 998244353;
    public static readonly long LM = 1L << 60;
    public static readonly double eps = 1e-11;
    public static void DBG(string a) => Console.Error.WriteLine(a);
    public static void DBG<T>(IEnumerable<T> a) => DBG(string.Join(" ", a));
    public static void DBG(params object[] a) => DBG(string.Join(" ", a));
    public static void Assert(params bool[] conds) {
        if (conds.Any(x => !x)) throw new Exception();
    }
    public static pair<T, U> make_pair<T, U>(T v1, U v2) => new pair<T, U>(v1, v2);
    public static int CompareList<T>(IList<T> a, IList<T> b) where T : IComparable<T> {
        for (int i = 0; i < a.Count && i < b.Count; i++)
            if (a[i].CompareTo(b[i]) != 0) return a[i].CompareTo(b[i]);
        return a.Count.CompareTo(b.Count);
    }
    public static bool inside(int i, int j, int h, int w) => i >= 0 && i < h && j >= 0 && j < w;
    public static readonly int[] dd = { 0, 1, 0, -1 };
    // static readonly string dstring = "RDLU";
    public static IEnumerable<P> adjacents(int i, int j) {
        for (int k = 0; k < 4; k++) yield return new P(i + dd[k], j + dd[k ^ 1]);
    }
    public static IEnumerable<P> adjacents(int i, int j, int h, int w)
        => adjacents(i, j).Where(p => inside(p.v1, p.v2, h, w));
    public static IEnumerable<P> adjacents(this P p) => adjacents(p.v1, p.v2);
    public static IEnumerable<P> adjacents(this P p, int h, int w) => adjacents(p.v1, p.v2, h, w);
    public static IEnumerable<int> all_subset(this int p) {
        for (int i = 0; ; i = i - p & p) {
            yield return i;
            if (i == p) break;
        }
    }
    public static Dictionary<T, int> compress<T>(this IEnumerable<T> a)
        => a.Distinct().OrderBy(v => v).Select((v, i) => new { v, i }).ToDictionary(p => p.v, p => p.i);
    public static Dictionary<T, int> compress<T>(params IEnumerable<T>[] a) => compress(a.SelectMany(x => x));
    public static T[] inv<T>(this Dictionary<T, int> dic) {
        var res = new T[dic.Count];
        foreach (var item in dic) res[item.Value] = item.Key;
        return res;
    }
    public static void swap<T>(ref T a, ref T b) where T : struct { var t = a; a = b; b = t; }
    public static void swap<T>(this IList<T> a, int i, int j) where T : struct { var t = a[i]; a[i] = a[j]; a[j] = t; }
    public static T[] copy<T>(this IList<T> a) {
        var ret = new T[a.Count];
        for (int i = 0; i < a.Count; i++) ret[i] = a[i];
        return ret;
    }
}

class Scan {
    StreamReader sr;
    public Scan() { sr = new StreamReader(Console.OpenStandardInput()); }
    public Scan(string path) { sr = new StreamReader(path); }
    public int Int => int.Parse(Str);
    public long Long => long.Parse(Str);
    public double Double => double.Parse(Str);
    public string Str => ReadLine.Trim();
    public string ReadLine => sr.ReadLine();
    public pair<T, U> Pair<T, U>() {
        T a; U b;
        Multi(out a, out b);
        return new pair<T, U>(a, b);
    }
    public P P => Pair<int, int>();
    public int[] IntArr => StrArr.Select(int.Parse).ToArray();
    public long[] LongArr => StrArr.Select(long.Parse).ToArray();
    public double[] DoubleArr => StrArr.Select(double.Parse).ToArray();
    public string[] StrArr => Str.Split(new[]{' '}, StringSplitOptions.RemoveEmptyEntries);
    bool eq<T, U>() => typeof(T).Equals(typeof(U));
    T ct<T, U>(U a) => (T)Convert.ChangeType(a, typeof(T));
    T cv<T>(string s) => eq<T, int>()    ? ct<T, int>(int.Parse(s))
                       : eq<T, long>()   ? ct<T, long>(long.Parse(s))
                       : eq<T, double>() ? ct<T, double>(double.Parse(s))
                       : eq<T, char>()   ? ct<T, char>(s[0])
                                         : ct<T, string>(s);
    public void Multi<T>(out T a) => a = cv<T>(Str);
    public void Multi<T, U>(out T a, out U b) {
        var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]);
    }
    public void Multi<T, U, V>(out T a, out U b, out V c) {
        var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]);
    }
    public void Multi<T, U, V, W>(out T a, out U b, out V c, out W d) {
        var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]); d = cv<W>(ar[3]);
    }
    public void Multi<T, U, V, W, X>(out T a, out U b, out V c, out W d, out X e) {
        var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]); d = cv<W>(ar[3]); e = cv<X>(ar[4]);
    }
    public void Multi<T, U, V, W, X, Y>(out T a, out U b, out V c, out W d, out X e, out Y f) {
        var ar = StrArr; a = cv<T>(ar[0]); b = cv<U>(ar[1]); c = cv<V>(ar[2]); d = cv<W>(ar[3]); e = cv<X>(ar[4]); f = cv<Y>(ar[5]);
    }
}
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