結果
| 問題 |
No.301 サイコロで確率問題 (1)
|
| コンテスト | |
| ユーザー |
 紙ぺーぱー
|
| 提出日時 | 2015-11-13 22:54:36 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 7,672 bytes |
| コンパイル時間 | 1,046 ms |
| コンパイル使用メモリ | 110,464 KB |
| 実行使用メモリ | 33,024 KB |
| 最終ジャッジ日時 | 2024-09-13 14:58:35 |
| 合計ジャッジ時間 | 5,460 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | TLE * 1 -- * 1 |
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.Diagnostics;
using System.Collections.Generic;
using Debug = System.Diagnostics.Debug;
using StringBuilder = System.Text.StringBuilder;
using System.Numerics;
using Number = System.Int64;
namespace Program
{
public class Solver
{
public void Solve()
{
var otakuspecial = sc.Integer();
for (int _ = 0; _ < otakuspecial; _++)
{
const double p = 1.0 / 6;
var k = sc.Long();
double l = 0.0, r = 1e9;
var ptr = 0;
while (l <= r && ptr < 1000)
{
var m = (l + r) / 2;
var mat = new Matrix(7, 7);
for (int i = 0; i < 5; i++)
mat[i, i + 1] = 1.0;
for (int i = 0; i < 6; i++)
mat[5, i] = p;
mat[5, 6] = mat[6, 6] = 1;
var ret = Matrix.Pow(mat, k);
var ans = 0.0;
var A = new double[7];
for (int i = 0; i < 5; i++)
A[i] = m;
A[6] = 1.0;
for (int i = 0; i < 7; i++)
ans += ret[5, i] * A[i];
if (ans < m)
r = m;
else l = m;
ptr++;
}
IO.Printer.Out.WriteLine(l);
}
}
public IO.StreamScanner sc = new IO.StreamScanner(Console.OpenStandardInput());
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();
Program.IO.Printer.Out.Flush();
}
}
#endregion
#region Ex
namespace Program.IO
{
using System.IO;
using System.Text;
using System.Globalization;
public class Printer : StreamWriter
{
static Printer() { Out = new Printer(Console.OpenStandardOutput()) { AutoFlush = false }; }
public static Printer Out { get; set; }
public override IFormatProvider FormatProvider { get { return CultureInfo.InvariantCulture; } }
public Printer(System.IO.Stream stream) : base(stream, new UTF8Encoding(false, true)) { }
public Printer(System.IO.Stream stream, Encoding encoding) : base(stream, encoding) { }
public void Write<T>(string format, T[] source) { base.Write(format, source.OfType<object>().ToArray()); }
public void WriteLine<T>(string format, T[] source) { base.WriteLine(format, source.OfType<object>().ToArray()); }
}
public class StreamScanner
{
public StreamScanner(Stream stream) { str = stream; }
public readonly Stream str;
private readonly byte[] buf = new byte[1024];
private int len, ptr;
public bool isEof = false;
public bool IsEndOfStream { get { return isEof; } }
private byte read()
{
if (isEof) return 0;
if (ptr >= len) { ptr = 0; if ((len = str.Read(buf, 0, 1024)) <= 0) { isEof = true; return 0; } }
return buf[ptr++];
}
public char Char() { byte b = 0; do b = read(); while ((b < 33 || 126 < b) && !isEof); return (char)b; }
public string Scan()
{
var sb = new StringBuilder();
for (var b = Char(); b >= 33 && b <= 126; b = (char)read())
sb.Append(b);
return sb.ToString();
}
public string ScanLine()
{
var sb = new StringBuilder();
for (var b = Char(); b != '\n'; b = (char)read())
if (b == 0) break;
else if (b != '\r') sb.Append(b);
return sb.ToString();
}
public long Long()
{
if (isEof) return long.MinValue;
long ret = 0; byte b = 0; var ng = false;
do b = read();
while (b != '-' && (b < '0' || '9' < b));
if (b == '-') { ng = true; b = read(); }
for (; true; b = read())
{
if (b < '0' || '9' < b)
return ng ? -ret : ret;
else ret = ret * 10 + b - '0';
}
}
public int Integer() { return (isEof) ? int.MinValue : (int)Long(); }
public double Double() { return double.Parse(Scan(), CultureInfo.InvariantCulture); }
private T[] enumerate<T>(int n, Func<T> f)
{
var a = new T[n];
for (int i = 0; i < n; ++i) a[i] = f();
return a;
}
public char[] Char(int n) { return enumerate(n, Char); }
public string[] Scan(int n) { return enumerate(n, Scan); }
public double[] Double(int n) { return enumerate(n, Double); }
public int[] Integer(int n) { return enumerate(n, Integer); }
public long[] Long(int n) { return enumerate(n, Long); }
}
}
#endregion
#region Matrix
public class Matrix
{
int row, col;
public double[] mat;
public double this[int r, int c]
{
get { return mat[r * col + c]; }
set { mat[r * col + c] = value; }
}
public Matrix(int r, int c)
{
if ((r & 1) == 1) r++;
if ((c & 1) == 1) c++;
row = r; col = c;
mat = new double[row * col];
}
public static Matrix operator +(Matrix l, Matrix r)
{
check(l, r);
var ret = new Matrix(l.row, l.col);
for (int i = 0; i < l.row; i++)
for (int j = 0; j < l.col; j++)
ret.mat[i * ret.col + j] = l.mat[i * l.col + j] + r.mat[i * r.col + j];
return ret;
}
public static Matrix operator *(Matrix l, Matrix r)
{
checkMul(l, r);
var ret = new Matrix(l.row, l.col);
for (int i = 0; i < l.row; i++)
for (int k = 0; k < l.row / 2; k++)
for (int j = 0; j < l.col; j++)
ret.mat[i * l.col + j] = (ret.mat[i * l.col + j] +
l.mat[i * l.col + k] * r.mat[k * l.col + j] +
l.mat[i * l.col + l.row - 1 - k] * r.mat[(l.row - 1 - k) * l.col + j]);
return ret;
}
public static Matrix Pow(Matrix m, long n)
{
var ret = new Matrix(m.row, m.col);
for (int i = 0; i < m.row; i++)
ret.mat[i * m.col + i] = 1;
for (; n > 0; m *= m, n >>= 1)
if ((n & 1) == 1)
ret = ret * m;
return ret;
}
public static Matrix Trans(Matrix m)
{
var ret = new Matrix(m.col, m.row);
for (int i = 0; i < m.row; i++)
for (int j = 0; j < m.col; j++)
ret.mat[j * m.col + i] = m.mat[i * m.col + j];
return ret;
}
[System.Diagnostics.Conditional("DEBUG")]
static private void check(Matrix a, Matrix b)
{
if (a.row != b.row || a.col != b.col)
throw new Exception("row and col have to be same.");
}
[System.Diagnostics.Conditional("DEBUG")]
static private void checkMul(Matrix a, Matrix b)
{
if (a.col != b.row)
throw new Exception("row and col have to be same.");
}
}
#endregion