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20 lines
495 B
C#
20 lines
495 B
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace _557B
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{
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class Program
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{
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static void Main(string[] args)
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{
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int[] ip = Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
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double[] a = Array.ConvertAll(Console.ReadLine().Split(), double.Parse);
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Array.Sort(a);
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Console.WriteLine(Math.Min(ip[1], ip[0] * Math.Min(a[0] * 3, a[ip[0]] * 3 / 2)).ToString(".##########").Replace(",", "."));
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}
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}
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}
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