using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Enter first number: ");

            int a = Int32.Parse(Console.ReadLine());

            Console.Write("Enter second number: ");

            int b = Int32.Parse(Console.ReadLine());

            Console.Write("Enter third number: ");

            int c = Int32.Parse(Console.ReadLine());

​

            if (a < 0 && b < 0 && c < 0) Console.WriteLine("-");

            else if (a >= 0 && b >= 0 && c >= 0) Console.WriteLine("+");

            else if (a < 0 && b < 0 && c >= 0) Console.WriteLine("+");

            else if (a < 0 && b >= 0 && c < 0) Console.WriteLine("+");

            else if (a >= 0 && b < 0 && c < 0) Console.WriteLine("+");

            else if (a < 0 && b >= 0 && c >= 0) Console.WriteLine("-");

            else if (a >= 0 && b < 0 && c >= 0) Console.WriteLine("-");

            else if (a >= 0 && b >= 0 && c < 0) Console.WriteLine("-");

    }

}