結果
問題 | No.76 回数の期待値で練習 |
ユーザー | femto |
提出日時 | 2015-04-02 02:35:21 |
言語 | C#(csc) (csc 3.9.0) |
結果 |
AC
|
実行時間 | 60 ms / 5,000 ms |
コード長 | 4,995 bytes |
コンパイル時間 | 862 ms |
コンパイル使用メモリ | 110,720 KB |
実行使用メモリ | 25,600 KB |
最終ジャッジ日時 | 2024-07-03 23:14:12 |
合計ジャッジ時間 | 1,400 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 60 ms
25,600 KB |
testcase_01 | AC | 59 ms
25,600 KB |
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.Diagnostics; using System.Collections.Generic; using System.Linq; using Enu = System.Linq.Enumerable; class Solution { int T; int N = 1000000; double[] p, dp; double[] ans = new double[] { 1.0833333333333333, 1.2569444444444444, 1.5353009259259260, 1.6915991512345676, 2.0513639724794235 }; void calc() { p = new double[6]; dp = new double[N + 10]; for (int k = 0; k < 5; k++) { double min = 0, max = 1, mid = 0; for (int i = 0; i < k; i++) max -= p[i]; for (int loop = 0; loop < 100; loop++) { mid = (min + max) / 2; p[k] = mid; p[5] = 1; for (int i = 0; i < 5; i++) p[5] -= p[i]; f(k + 2); if (dp[k + 2] > ans[k]) max = mid; else min = mid; } p[k] = mid; p[5] = 1; for (int i = 0; i < 5; i++) p[5] -= p[i]; } f(N + 1); T = ri(); var anslist = new List<double>(); for (int loop = 0; loop < T; loop++) { var r = ri(); anslist.Add(dp[r]); } foreach (var a in anslist) Console.WriteLine(a); } void f(int n) { dp[0] = 0; for (int i = 1; i < n + 1; i++) { dp[i] = 1; for (int j = 0; j < 6; j++) { if (i - j - 1 >= 0) dp[i] += dp[i - j - 1] * p[j]; } } } static void Main(string[] args) { new Solution().calc(); } #region static int ri() { return int.Parse(Console.ReadLine()); } static int[] ria(int n) { if (n <= 0) { Console.ReadLine(); return new int[0]; } else return Console.ReadLine().Trim().Split(' ').Select(int.Parse).ToArray(); } static void rio(out int p1) { p1 = ri(); } static void rio(out int p1, out int p2) { var r = ria(2); p1 = r[0]; p2 = r[1]; } static void rio(out int p1, out int p2, out int p3) { var r = ria(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; } static void rio(out int p1, out int p2, out int p3, out int p4) { var r = ria(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; } static void rio(out int p1, out int p2, out int p3, out int p4, out int p5) { var r = ria(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; } static long rl() { return long.Parse(Console.ReadLine()); } static long[] rla(int n) { if (n <= 0) { Console.ReadLine(); return new long[0]; } else return Console.ReadLine().Trim().Split(' ').Select(long.Parse).ToArray(); } static void rlo(out long p1) { p1 = rl(); } static void rlo(out long p1, out long p2) { var r = rla(2); p1 = r[0]; p2 = r[1]; } static void rlo(out long p1, out long p2, out long p3) { var r = rla(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; } static void rlo(out long p1, out long p2, out long p3, out long p4) { var r = rla(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; } static void rlo(out long p1, out long p2, out long p3, out long p4, out long p5) { var r = rla(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; } static double rd() { return double.Parse(Console.ReadLine()); } static double[] rda(int n) { if (n <= 0) { Console.ReadLine(); return new double[0]; } else return Console.ReadLine().Trim().Split(' ').Select(double.Parse).ToArray(); } static void rdo(out double p1) { p1 = rd(); } static void rdo(out double p1, out double p2) { var r = rda(2); p1 = r[0]; p2 = r[1]; } static void rdo(out double p1, out double p2, out double p3) { var r = rda(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; } static void rdo(out double p1, out double p2, out double p3, out double p4) { var r = rda(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; } static void rdo(out double p1, out double p2, out double p3, out double p4, out double p5) { var r = rda(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; } static void swap<T>(ref T x, ref T y) { T temp = x; x = y; y = temp; } static void wa1<T>(T[] a) { Debug.WriteLine(string.Join(" ", a)); } static void wa2<T>(T[][] a) { foreach (var row in a) { Debug.WriteLine(String.Join(" ", row)); } } [DebuggerDisplay("{x} , {y}")] class point { public int x, y; public point(int x, int y) { this.x = x; this.y = y; } } #endregion } static class Extention { public static T[][] ToJagArray<T>(this T[,] a) { int n = a.GetLength(0), m = a.GetLength(1); var ret = new T[n][]; for (int i = 0; i < n; i++) { ret[i] = new T[m]; for (int j = 0; j < m; j++) { ret[i][j] = a[i, j]; } } return ret; } }