'''  a series of numbers in which each number ( Fibonacci number ) is the sum of the two preceding numbers. The simplest is the series 0, 1, 1, 2, 3, 5, 8, etc.  '''

n=int(input('Enter number: '))  '''Accpt number from user'''

n1=0  

n2=1

print('Fibonacci series up to given number :')

print(n1, end="  ")  '''print value of n1'''

print(n2,end="  ")   '''print value of n2'''

n3=n1+n2  

print(n3,end="  ")   '''print value of n3'''

while n3<n:  '''loop runs until n3 becomes less than given number(n)'''

    n1=n2

    n2=n3

    n3=n1+n2

    print(n3,end="  ")