結果
| 問題 |
No.162 8020運動
|
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2015-03-08 19:50:43 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 1,554 ms / 5,000 ms |
| コード長 | 3,638 bytes |
| コンパイル時間 | 1,170 ms |
| コンパイル使用メモリ | 116,720 KB |
| 実行使用メモリ | 141,048 KB |
| 最終ジャッジ日時 | 2024-06-24 16:21:11 |
| 合計ジャッジ時間 | 38,809 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
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
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;
void Solve()
{
int Age = reader.Int();
var GoodProb = Enu.Range(0, 3).Select(i => 1 - reader.Double() / 100).ToArray();
var state = new List<Edge>[1 << NumTeeth];
for (int mask = 0; mask < (1 << NumTeeth); mask++)
{
state[mask] = new List<Edge>();
int A = mask << 1;
for (int sub = mask; ; sub = (sub - 1) & mask)
{
int B = sub << 1;
double p = 1;
for (int i = 1; i <= NumTeeth; i++)
if ((A >> i & 1) == 1)
{
int count = (A >> (i - 1) & 1) + (A >> (i + 1) & 1);
if ((B >> i & 1) == 1) p *= GoodProb[count];
else p *= 1 - GoodProb[count];
}
state[mask].Add(new Edge(sub, p));
if (sub == 0) break;
}
}
double[] prob = new double[1 << NumTeeth];
prob[(1 << NumTeeth) - 1] = 1;
for (int age = Age; age < Target; age++)
{
var next = new double[prob.Length];
for (int mask = 0; mask < (1 << NumTeeth); mask++)
foreach (var e in state[mask])
next[e.next] += prob[mask] * e.prob;
prob = next;
}
double ans = 0;
for (int mask = 0; mask < prob.Length; mask++)
ans += BitCount(mask) * prob[mask];
ans *= 2;
Console.WriteLine(ans);
}
struct Edge
{
public int next;
public double prob;
public Edge(int next, double p) { this.next = next; prob = p; }
}
int BitCount(long 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++]; }
}
eitaho