using System;
class Program
{
static void Main()
{
Console.WriteLine(Math.Floor(3.0));
Console.WriteLine(Math.Floor(3.14));
Console.WriteLine(Math.Floor(3.4));
Console.WriteLine(Math.Floor(3.5));
Console.WriteLine(Math.Floor(3.6));
Console.WriteLine(Math.Floor(3.99));
}
}
/*
run:
3
3
3
3
3
3
*/