using System;
class HelloWorld {
static void Main() {
string value = "5002"; // wartość 5002 to 500.2
Console.WriteLine(value.Insert(value.Length - 1, "."));
value = "23"; // 23 to 2.3
Console.WriteLine(value.Insert(value.Length - 1, "."));
value = "10000"; // 10000 to 1000.0
Console.WriteLine(value.Insert(value.Length - 1, "."));
// Console.ReadKey();
}
}