using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        Console.Write("enter number : ");

        int num = Convert.ToInt32(Console.ReadLine());

        while(true)

        {

            if(num>2 && num<6)

                break;

            else

            {

                Console.Write("enter number : ");

                num = Convert.ToInt32(Console.ReadLine());

            }

        }

        double[] n = new double[num];

        for(int i=0 ; i<num ; i++)

        {

            Console.Write("input n{0} : ",i+1);

            n[i] = Convert.ToDouble(Console.ReadLine());

        }

        Console.WriteLine("min = {0}",n.Min());

    }

}