結果
| 問題 |
No.553 AlphaCoder Rating
|
| ユーザー |
|
| 提出日時 | 2017-08-11 23:01:52 |
| 言語 | C#(csc) (csc 3.9.0) |
| 結果 |
AC
|
| 実行時間 | 192 ms / 1,500 ms |
| コード長 | 2,771 bytes |
| コンパイル時間 | 1,023 ms |
| コンパイル使用メモリ | 110,720 KB |
| 実行使用メモリ | 21,632 KB |
| 最終ジャッジ日時 | 2024-10-12 21:41:09 |
| 合計ジャッジ時間 | 4,777 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 |
|---|---|
| sample | AC * 3 |
| other | AC * 12 |
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.Collections.Generic;
using System.Linq;
using System.IO;
using System.Globalization;
using System.Diagnostics;
using static System.Console;
using Pair = System.Collections.Generic.KeyValuePair<int, int>;
//using System.Numerics;
class Program
{
static void Main()
{
//SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
new Program().solve();
Out.Flush();
}
Scanner cin = new Scanner();
Random rnd = new Random();
Stopwatch sw = new Stopwatch();
readonly int[] dd = { 0, 1, 0, -1, 0 };
readonly int mod = 1000000007;
readonly string alfa = "abcdefghijklmnopqrstuvwxyz";
readonly string ALFA = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int N;
int[] R;
void solve()
{
N = cin.nextint;
R = new int[N];
for (int i = 0; i < N; i++)
{
R[i] = cin.nextint;
}
WriteLine(ratingN().ToString("F0"));
}
double ratingN()
{
var L = R.Select(i => g(i)).ToArray();
var E = Enumerable.Range(1, N).Select(i => Math.Pow(0.9, i)).ToArray();
for (int i = 0; i < N; i++)
{
L[i] *= E[i];
}
//WriteLine(1 / g(L.Sum() / E.Sum()));
return arcg(L.Sum() / E.Sum()) - f();
}
double g(double X)
{
//WriteLine("g " + Math.Pow(2.0, X / 800));
return Math.Pow(2.0, X / 800);
}
double f()
{
return (F(N) - F(1000000)) / (F(1) - F(1000000)) * 1200;
}
double F(int n)
{
var E1 = Enumerable.Range(1, n).Select(i => Math.Pow(0.81, i));
var E2 = Enumerable.Range(1, n).Select(i => Math.Pow(0.9, i));
return Math.Sqrt(E1.Sum()) / E2.Sum();
}
double arcg(double Y)
{
return 800 * Math.Log(Y) / Math.Log(2);
}
}
class Scanner
{
string[] s; int i;
char[] cs = new char[] { ' ' };
public Scanner() { s = new string[0]; i = 0; }
public string[] scan { get { return ReadLine().Split(); } }
public int[] scanint { get { return Array.ConvertAll(scan, int.Parse); } }
public long[] scanlong { get { return Array.ConvertAll(scan, long.Parse); } }
public double[] scandouble { get { return Array.ConvertAll(scan, double.Parse); } }
public string next
{
get
{
if (i < s.Length) return s[i++];
string st = ReadLine();
while (st == "") st = ReadLine();
s = st.Split(cs, StringSplitOptions.RemoveEmptyEntries);
i = 0;
return next;
}
}
public int nextint { get { return int.Parse(next); } }
public long nextlong { get { return long.Parse(next); } }
public double nextdouble { get { return double.Parse(next); } }
}