{}
using System;
using System.Collections.Generic;
class Program
{
static IEnumerable<long> Fibonacci()
{
long a = 0, b = 1;
while (true)
{
yield return a;
(a, b) = (b, a + b);
}
}
static void Main()
{
foreach (long n in Fibonacci())
{
if (n >= 100) break;
Console.Write(n + " ");
}
}
}