結果

問題 No.852 連続部分文字列
ユーザー ひばちひばち
提出日時 2020-05-05 15:39:05
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 2,411 ms / 3,153 ms
コード長 6,191 bytes
コンパイル時間 4,506 ms
コンパイル使用メモリ 113,228 KB
実行使用メモリ 35,072 KB
最終ジャッジ日時 2023-09-08 18:00:38
合計ジャッジ時間 36,400 ms
ジャッジサーバーID
（参考情報） 		judge13 / judge15
このコードへのチャレンジ（β）

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 64 ms
23,464 KB
testcase_01 AC 64 ms
23,412 KB
testcase_02 AC 63 ms
23,376 KB
testcase_03 AC 64 ms
21,400 KB
testcase_04 AC 64 ms
23,612 KB
testcase_05 AC 64 ms
25,284 KB
testcase_06 AC 65 ms
21,448 KB
testcase_07 AC 65 ms
23,368 KB
testcase_08 AC 64 ms
25,416 KB
testcase_09 AC 64 ms
23,552 KB
testcase_10 AC 64 ms
21,324 KB
testcase_11 AC 64 ms
23,484 KB
testcase_12 AC 63 ms
21,572 KB
testcase_13 AC 106 ms
27,516 KB
testcase_14 AC 82 ms
27,464 KB
testcase_15 AC 131 ms
25,516 KB
testcase_16 AC 106 ms
27,684 KB
testcase_17 AC 121 ms
27,472 KB
testcase_18 AC 139 ms
29,816 KB
testcase_19 AC 69 ms
23,520 KB
testcase_20 AC 97 ms
27,564 KB
testcase_21 AC 139 ms
27,700 KB
testcase_22 AC 87 ms
25,712 KB
testcase_23 AC 115 ms
25,668 KB
testcase_24 AC 92 ms
25,408 KB
testcase_25 AC 113 ms
27,804 KB
testcase_26 AC 136 ms
29,440 KB
testcase_27 AC 107 ms
25,536 KB
testcase_28 AC 122 ms
29,604 KB
testcase_29 AC 139 ms
27,632 KB
testcase_30 AC 78 ms
23,480 KB
testcase_31 AC 143 ms
27,684 KB
testcase_32 AC 145 ms
27,608 KB
testcase_33 AC 2,364 ms
31,136 KB
testcase_34 AC 2,360 ms
31,132 KB
testcase_35 AC 2,353 ms
33,124 KB
testcase_36 AC 2,353 ms
33,192 KB
testcase_37 AC 2,354 ms
35,072 KB
testcase_38 AC 2,351 ms
29,176 KB
testcase_39 AC 2,354 ms
31,320 KB
testcase_40 AC 2,366 ms
33,308 KB
testcase_41 AC 2,411 ms
31,140 KB
testcase_42 AC 2,261 ms
31,012 KB
testcase_43 AC 1,988 ms
29,020 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.Runtime.CompilerServices;
using System.Text;
using System.Diagnostics;
using System.Numerics;
using static System.Console;
using static System.Convert;
using static System.Math;
using static Template;
using Pi = Pair<int, int>;

class Solver
{
    public void Solve(Scanner sc)
    {
        var S = sc.Str;
        var last = Create(27, () => int.MaxValue / 2);last[26] = -1;
        var res = 0L;
        for (int i = 0; i < S.Length; i++)
        {
            last[S[i] - 'a'] = i;
            var cp = last.ToArray();
            Array.Sort(cp);
            var ct = cp.Count(v => v != int.MaxValue / 2);
            for (int j = 1; j < ct; j++)
                res += (ct - j) * (cp[j] - cp[j - 1]);
        }
        Console.WriteLine((double)res/(S.Length*(S.Length+1L)/2));
    }
}

#region Template
public static class Template
{
    static void Main(string[] args)
    {
        Console.SetOut(new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false });
        new Solver().Solve(new Scanner());
        Console.Out.Flush();
    }
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool chmin<T>(ref T a, T b) where T : IComparable<T> { if (a.CompareTo(b) > 0) { a = b; return true; } return false; }
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static bool chmax<T>(ref T a, T b) where T : IComparable<T> { if (a.CompareTo(b) < 0) { a = b; return true; } return false; }
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static void swap<T>(ref T a, ref T b) { var t = b; b = a; a = t; }
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public static void swap<T>(this IList<T> A, int i, int j) { var t = A[i]; A[i] = A[j]; A[j] = t; }
    public static T[] Create<T>(int n, Func<T> f) { var rt = new T[n]; for (var i = 0; i < rt.Length; ++i) rt[i] = f(); return rt; }
    public static T[] Create<T>(int n, Func<int, T> f) { var rt = new T[n]; for (var i = 0; i < rt.Length; ++i) rt[i] = f(i); return rt; }
    public static IEnumerable<T> Shuffle<T>(this IEnumerable<T> A) => A.OrderBy(v => Guid.NewGuid());
    public static int CompareTo<T>(this T[] A, T[] B, Comparison<T> cmp = null) { cmp = cmp ?? Comparer<T>.Default.Compare; for (var i = 0; i < Min(A.Length, B.Length); i++) { int c = cmp(A[i], B[i]); if (c > 0) return 1; else if (c < 0) return -1; } if (A.Length == B.Length) return 0; if (A.Length > B.Length) return 1; else return -1; }
    public static int MaxElement<T>(this IList<T> A, Comparison<T> cmp = null) { cmp = cmp ?? Comparer<T>.Default.Compare; T max = A[0]; int rt = 0; for (int i = 1; i < A.Count; i++) if (cmp(max, A[i]) < 0) { max = A[i]; rt = i; } return rt; }
    public static T PopBack<T>(this List<T> A) { var v = A[A.Count - 1]; A.RemoveAt(A.Count - 1); return v; }
    public static void Fail<T>(T s) { Console.WriteLine(s); Console.Out.Close(); Environment.Exit(0); }
}
public class Scanner
{
    public string Str => Console.ReadLine().Trim();
    public int Int => int.Parse(Str);
    public long Long => long.Parse(Str);
    public double Double => double.Parse(Str);
    public int[] ArrInt => Str.Split(' ').Select(int.Parse).ToArray();
    public long[] ArrLong => Str.Split(' ').Select(long.Parse).ToArray();
    public char[][] Grid(int n) => Create(n, () => Str.ToCharArray());
    public int[] ArrInt1D(int n) => Create(n, () => Int);
    public long[] ArrLong1D(int n) => Create(n, () => Long);
    public int[][] ArrInt2D(int n) => Create(n, () => ArrInt);
    public long[][] ArrLong2D(int n) => Create(n, () => ArrLong);
    private Queue<string> q = new Queue<string>();
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public T Next<T>() { if (q.Count == 0) foreach (var item in Str.Split(' ')) q.Enqueue(item); return (T)Convert.ChangeType(q.Dequeue(), typeof(T)); }
    public void Make<T1>(out T1 v1) => v1 = Next<T1>();
    public void Make<T1, T2>(out T1 v1, out T2 v2) { v1 = Next<T1>(); v2 = Next<T2>(); }
    public void Make<T1, T2, T3>(out T1 v1, out T2 v2, out T3 v3) { Make(out v1, out v2); v3 = Next<T3>(); }
    public void Make<T1, T2, T3, T4>(out T1 v1, out T2 v2, out T3 v3, out T4 v4) { Make(out v1, out v2, out v3); v4 = Next<T4>(); }
    public void Make<T1, T2, T3, T4, T5>(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5) { Make(out v1, out v2, out v3, out v4); v5 = Next<T5>(); }
    public void Make<T1, T2, T3, T4, T5, T6>(out T1 v1, out T2 v2, out T3 v3, out T4 v4, out T5 v5, out T6 v6) { Make(out v1, out v2, out v3, out v4, out v5); v6 = Next<T6>(); }
    //public (T1, T2) Make<T1, T2>() { Make(out T1 v1, out T2 v2); return (v1, v2); }
    //public (T1, T2, T3) Make<T1, T2, T3>() { Make(out T1 v1, out T2 v2, out T3 v3); return (v1, v2, v3); }
    //public (T1, T2, T3, T4) Make<T1, T2, T3, T4>() { Make(out T1 v1, out T2 v2, out T3 v3, out T4 v4); return (v1, v2, v3, v4); }
}
public class Pair<T1, T2> : IComparable<Pair<T1, T2>>
{
    public T1 v1;
    public T2 v2;
    public Pair() { }
    public Pair(T1 v1, T2 v2)
    { this.v1 = v1; this.v2 = v2; }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public int CompareTo(Pair<T1, T2> p)
    {
        var c = Comparer<T1>.Default.Compare(v1, p.v1);
        if (c == 0)
            c = Comparer<T2>.Default.Compare(v2, p.v2);
        return c;
    }
    public override string ToString() => $"{v1.ToString()} {v2.ToString()}";
    public void Deconstruct(out T1 a, out T2 b) { a = v1; b = v2; }
}

public class Pair<T1, T2, T3> : Pair<T1, T2>, IComparable<Pair<T1, T2, T3>>
{
    public T3 v3;
    public Pair() : base() { }
    public Pair(T1 v1, T2 v2, T3 v3) : base(v1, v2)
    { this.v3 = v3; }

    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    public int CompareTo(Pair<T1, T2, T3> p)
    {
        var c = base.CompareTo(p);
        if (c == 0)
            c = Comparer<T3>.Default.Compare(v3, p.v3);
        return c;
    }
    public override string ToString() => $"{base.ToString()} {v3.ToString()}";
    public void Deconstruct(out T1 a, out T2 b, out T3 c) { Deconstruct(out a, out b); c = v3; }
}
#endregion
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