gistfile1.py

import datetime

def add(x): return x*100 + 1 


def count(x): return x + 1
def f1(a,b):
	if b==99:
		return a
	else:
		return f1(add(a),count(b))
		

def f2():
	a=0
	for x in xrange(1,100):
		a=a*100+1
	return a

def main():
	starttime = datetime.datetime.now()
	print f1(1,1)
	endtime = datetime.datetime.now()
	print (endtime - starttime).microseconds

	starttime = datetime.datetime.now()
	print f2()
	endtime = datetime.datetime.now()
	print (endtime - starttime).microseconds

	starttime = datetime.datetime.now()
	print bin(sum(1 << (x << 1) for x in range(99))).lstrip('0b') 
	endtime = datetime.datetime.now()
	print (endtime - starttime).microseconds

if __name__=='__main__':
	main()