結果

問題 No.162 8020運動
ユーザー eitaho
提出日時 2015-03-06 21:20:37
言語 C#(csc)
(csc 3.9.0)
結果
AC  
実行時間 216 ms / 5,000 ms
コード長 3,254 bytes
コンパイル時間 1,004 ms
コンパイル使用メモリ 118,260 KB
実行使用メモリ 28,324 KB
最終ジャッジ日時 2024-06-24 09:55:32
合計ジャッジ時間 5,672 ms
ジャッジサーバーID
(参考情報)
judge4 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 26
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 #
プレゼンテーションモードにする

using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using Enu = System.Linq.Enumerable;
class Program
{
static readonly int NumTeeth = 14;
static readonly int Target = 80;
double[] Prob;
double?[,] memo;
void Solve()
{
int Age = reader.Int();
Prob = Enu.Range(0, 3).Select(i => 1 - reader.Double() / 100).ToArray();
int rem = Target - Age;
memo = new double?[rem + 1, NumTeeth + 1];
double ans = Rec(rem, NumTeeth) * 2;
Console.WriteLine(ans);
}
private double Rec(int rem, int len)
{
if (rem == 0 || len == 0) return len;
if (memo[rem, len].HasValue) return memo[rem, len].Value;
if (len == 1) return Prob[0] * Rec(rem - 1, 1);
double res = 0;
for (int next = 0; next < (1 << len); next++)
{
int count = 0;
double p = 1, sum = 0;
for (int i = 0; i <= len; i++)
{
if ((next >> i & 1) == 1)
{
count++;
p *= (i == 0 || i == len - 1) ? Prob[1] : Prob[2];
}
else
{
sum += Rec(rem - 1, count);
count = 0;
if (i < len) p *= (i == 0 || i == len - 1) ? 1 - Prob[1] : 1 - Prob[2];
}
}
res += p * sum;
}
memo[rem, len] = res;
return res;
}
int BitCount(int x) { return x == 0 ? 0 : 1 + BitCount(x & x - 1); }
Reader reader = new Reader(Console.In);
static void Main() { new Program().Solve(); }
}
class Reader
{
private readonly TextReader reader;
private readonly char[] separator = { ' ' };
private readonly StringSplitOptions removeOp = StringSplitOptions.RemoveEmptyEntries;
private string[] A = new string[0];
private int i;
public Reader(TextReader r) { reader = r; }
public Reader(string file) { reader = new StreamReader(file); }
public bool HasNext() { return Enqueue(); }
public string String() { return Dequeue(); }
public int Int() { return int.Parse(Dequeue()); }
public long Long() { return long.Parse(Dequeue()); }
public double Double() { return double.Parse(Dequeue()); }
public int[] IntLine() { var s = Line(); return s == "" ? new int[0] : Array.ConvertAll(Split(s), int.Parse); }
public int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
public int[][] IntGrid(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
public string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
public string Line() { return reader.ReadLine().Trim(); }
private string[] Split(string s) { return s.Split(separator, removeOp); }
private bool Enqueue()
{
if (i < A.Length) return true;
string line = reader.ReadLine();
if (line == null) return false;
if (line == "") return Enqueue();
A = Split(line);
i = 0;
return true;
}
private string Dequeue() { Enqueue(); return A[i++]; }
}
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