結果
| 問題 |
No.463 魔法使いのすごろく🎲
|
| コンテスト | |
| ユーザー |
紙ぺーぱー
|
| 提出日時 | 2016-12-12 13:52:08 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,693 bytes |
| コンパイル時間 | 1,077 ms |
| コンパイル使用メモリ | 110,208 KB |
| 実行使用メモリ | 20,352 KB |
| 最終ジャッジ日時 | 2024-11-29 15:52:29 |
| 合計ジャッジ時間 | 3,436 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 27 WA * 9 |
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.Linq;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Point = System.Numerics.Complex;
using Number = System.Int64;
using C = System.Int32;
namespace Program
{
public class Solver
{
public void Solve()
{
var s = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();
s.Validate(x => x.Length == 2);
var n = s[0].Validate(x => 2 <= x && x <= 100);
var m = s[1].Validate(x => 1 <= x && x <= n);
var A = new int[n + 1];
if (n > 2)
{
s = Console.ReadLine().Split(' ').Select(int.Parse).ToArray().ValidateArray(x => 0 <= x && x <= 1000000000);
s.Validate(x => x.Length == n - 2);
for (int i = 2; i < n; i++)
A[i] = s[i - 2];
}
Debug.WriteLine(A.AsJoinedString());
var dp = Enumerate(200, x => new double[n + 1]);
for (int k = 0; k < 200; k++)
for (int i = 0; i < n; i++)
dp[k][i] = -1;
Func<int, int, double> dfs = null;
dfs = (k, i) =>
{
if (k < 0) return 0.0;
if (dp[k][i] > -0.5) return dp[k][i];
var ret = 0.0;
for (int j = 1; j <= m; j++)
{
var go = i + j;
if (go > n) go = n - (go - n);
ret += A[go];
ret += dfs(k - 1, go);
}
ret /= m;
return dp[k][i] = ret;
};
var DP = new double[n + 1];
for (int i = 0; i <= n; i++)
DP[i] = -1;
Func<int, double> efs = null;
efs = i =>
{
//Debug.WriteLine(i);
if (DP[i] > -0.5) return DP[i];
if (i + m >= n) return 0;
var ret = 0.0;
var min = double.MaxValue;
for (int j = 1; j <= m; j++)
{
var go = i + j;
if (go > n) go = n - (go - n);
ret += A[go];
ret += efs(go);
min = Math.Min(min, A[go] + dfs(49, go));
}
ret /= m;
ret = Math.Min(ret, min);
return DP[i] = ret;
};
Console.WriteLine("{0:0.000000000}", efs(1));
}
static T[] Enumerate<T>(int n, Func<int, T> f) { var a = new T[n]; for (int i = 0; i < n; ++i) a[i] = f(i); return a; }
static public void Swap<T>(ref T a, ref T b) { var tmp = a; a = b; b = tmp; }
}
}
#region main
static class Ex
{
static public string AsString(this IEnumerable<char> ie) { return new string(System.Linq.Enumerable.ToArray(ie)); }
static public string AsJoinedString<T>(this IEnumerable<T> ie, string st = " ") { return string.Join(st, ie); }
static public void Main()
{
var solver = new Program.Solver();
solver.Solve();
}
}
#endregion
static public class Validator
{
static public T Validate<T>(this T input, Func<T, bool> f)
{
if (!f(input))
throw new Exception("invalid input");
return input;
}
static public T[] ValidateArray<T>(this T[] input, Func<T, bool> f)
{
foreach (var x in input)
if (!f(x))
throw new Exception("invalid input");
return input;
}
}
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