using System;

namespace DoubleType
{
    class OnlyNegative
    {
        static void Main(string[] args)
        {
            double one = double.Parse(Console.ReadLine());
            double two = double.Parse(Console.ReadLine());
            double three = double.Parse(Console.ReadLine());
            double four = double.Parse(Console.ReadLine());
            double five = double.Parse(Console.ReadLine());

            if(one < 0)
            Console.WriteLine(one);
            if(two < 0)
            Console.WriteLine(two);
            if(three < 0)
            Console.WriteLine(three);
            if(four < 0)
            Console.WriteLine(four);
            if(five < 0)
            Console.WriteLine(five);
        }
    }
}