結果

問題 No.852 連続部分文字列
ユーザー claw88claw88
提出日時 2019-07-26 21:48:56
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 82 ms / 3,153 ms
コード長 3,897 bytes
コンパイル時間 3,578 ms
コンパイル使用メモリ 111,540 KB
実行使用メモリ 35,764 KB
最終ジャッジ日時 2023-09-15 01:06:05
合計ジャッジ時間 7,102 ms
ジャッジサーバーID
（参考情報） 		judge13 / judge14
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 59 ms
24,584 KB
testcase_01 AC 59 ms
24,640 KB
testcase_02 AC 58 ms
22,692 KB
testcase_03 AC 58 ms
24,560 KB
testcase_04 AC 58 ms
22,600 KB
testcase_05 AC 59 ms
22,500 KB
testcase_06 AC 58 ms
20,384 KB
testcase_07 AC 59 ms
22,512 KB
testcase_08 AC 58 ms
22,428 KB
testcase_09 AC 61 ms
22,568 KB
testcase_10 AC 59 ms
22,648 KB
testcase_11 AC 60 ms
24,588 KB
testcase_12 AC 59 ms
22,568 KB
testcase_13 AC 61 ms
24,672 KB
testcase_14 AC 60 ms
22,624 KB
testcase_15 AC 60 ms
22,604 KB
testcase_16 AC 60 ms
24,636 KB
testcase_17 AC 60 ms
22,428 KB
testcase_18 AC 60 ms
24,600 KB
testcase_19 AC 60 ms
24,488 KB
testcase_20 AC 60 ms
24,528 KB
testcase_21 AC 60 ms
22,456 KB
testcase_22 AC 60 ms
22,608 KB
testcase_23 AC 60 ms
20,580 KB
testcase_24 AC 60 ms
22,568 KB
testcase_25 AC 59 ms
22,616 KB
testcase_26 AC 60 ms
22,500 KB
testcase_27 AC 61 ms
24,620 KB
testcase_28 AC 59 ms
22,600 KB
testcase_29 AC 60 ms
24,536 KB
testcase_30 AC 60 ms
22,720 KB
testcase_31 AC 60 ms
22,504 KB
testcase_32 AC 60 ms
22,440 KB
testcase_33 AC 82 ms
31,752 KB
testcase_34 AC 80 ms
31,656 KB
testcase_35 AC 79 ms
35,764 KB
testcase_36 AC 80 ms
31,840 KB
testcase_37 AC 80 ms
31,808 KB
testcase_38 AC 79 ms
33,624 KB
testcase_39 AC 79 ms
33,728 KB
testcase_40 AC 80 ms
35,704 KB
testcase_41 AC 79 ms
35,692 KB
testcase_42 AC 80 ms
35,720 KB
testcase_43 AC 79 ms
33,772 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()
    {
        var S = ReadLine();
        int N = S.Length;

        var dp = new long[N + 1];

        var last = new int[26];
        for (int i = 0; i < 26; i++)
        {
            last[i] = -1;
        }

        for (int i = 0; i < N; i++)
        {
            //int L = last[S[i] - 'a'] + 1;

            var lastnum = i;
            var bad = last[S[i] - 'a'] + 1;

            last[S[i] - 'a'] = i;
            dp[i + 1] = dp[i] + (i + 1) - bad;
        }

        long sum = 0;
        long cnt = 0;
        for (int i = 0; i < N; i++)
        {
            sum += dp[i + 1];
            cnt += i + 1;
        }

        WriteLine(((double)sum / cnt).ToString("F6"));

    }

}


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);
}
0