using System;
public class Program
{
public static void Main()
var random = new Random();
int numI = random.Next(-10000,10000);
string numS = numI.ToString();
for (int i = 0; i < numS.Length; i++)
if (((numI < 0) && (numS[i] > '5')) || ((numI>=0) && (numS[i] < '5')))
numS=numS.Insert(i,"5");
break;
}
Console.WriteLine(numI);
Console.WriteLine(numS);