結果
| 問題 | No.155 生放送とBGM |
| コンテスト | |
| ユーザー |
eitaho
|
| 提出日時 | 2015-02-18 22:14:46 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 3,317 ms / 6,000 ms |
| コード長 | 3,630 bytes |
| コンパイル時間 | 923 ms |
| コンパイル使用メモリ | 109,952 KB |
| 実行使用メモリ | 124,544 KB |
| 最終ジャッジ日時 | 2024-06-23 21:08:41 |
| 合計ジャッジ時間 | 14,738 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 15 |
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
{
void Solve()
{
int N = reader.Int(), L = reader.Int() * 60;
var S = Enu.Range(0, N).Select(i => reader.String()).ToArray();
var Sec = S.Select(s => int.Parse(s.Substring(0, 2)) * 60 + int.Parse(s.Substring(3))).ToArray();
int[] sumSec = new int[N];
for (int i = 0; i < N; i++) sumSec[i] = Sec[i] + (i > 0 ? sumSec[i - 1] : 0);
if (sumSec[N - 1] <= L) { Console.WriteLine(N); return; }
double[] fact = new double[N + 1];
fact[0] = 1;
for (int i = 1; i <= N; i++) fact[i] = fact[i - 1] * i;
var dp = new long[N + 1][];
var others = new long[N + 1][];
for (int i = 0; i < dp.Length; i++)
{
dp[i] = new long[sumSec[N - 1] + 1];
others[i] = new long[sumSec[N - 1] + 1];
}
dp[0][0] = others[0][0] = 1;
for (int i = 0; i < N; i++)
for (int used = i; used >= 0; used--)
for (int len = 0; len + Sec[i] <= sumSec[i]; len++)
dp[used + 1][len + Sec[i]] += dp[used][len];
double ans = 0;
var descending = Sec.OrderByDescending(s => s).ToArray();
var desSum = new int[N];
for (int i = 0; i < N; i++) desSum[i] = descending[i] + (i > 0 ? desSum[i - 1] : 0);
for (int i = 0; i < N; i++)
{
double bad = 0;
for (int used = 1; used < N; used++)
for (int len = 0; len <= desSum[used]; len++)
{
others[used][len] = dp[used][len];
if (len >= Sec[i]) others[used][len] -= others[used - 1][len - Sec[i]];
if (len >= L && others[used][len] > 0) bad += others[used][len] * fact[used] * fact[N - used - 1];
}
bad /= fact[N];
ans += 1 - bad;
}
Console.WriteLine(ans);
}
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 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[] StringLine(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