n1 = input("How many bottles are on the wall when you start? ")
people = input("How many people are drinking with you? ")
weight = input("How much do you weigh? ")
n = n1

#bac is a function to calculate Blood Alcohal Level based on User Input.
#I use n1-n to calculate the number of drinks that have been removed from 
#the wall.
for n in range(n, 1, -1):
	
		
	def bac(n):
		drinks = ((n1 - n) * 1.0)/people
		weight_effect = weight/2000.0
		adj_level = ((drinks * 4)/100) - weight_effect
		if adj_level < 0 :
			adj_level = 0
		return adj_level	
	
#This is a modified chaos program which returns a value which is higher
#the more the person has had to drink.  However, it is chaotic, so there 
#can be a lot of variation.
	def chaos(n):
		l = 10*bac(n)
		r = n/100
		xa = l * r * (1-r)
		r = r + .01
		xb = l * r * (1-r)
		r = r + .02
		xc = l * r * (1-r)
		x = ((xa + xb + xc)/3) - xa
		return int(100*x)
		
#I use the output from the chaos function to slurr speach in phrase1,
#add number to "n" in phrase2, and repeat lines in the verse.
	def phrase1(n):
		s =(chaos(n)+1) * "s"
		e = (2*chaos(n)+1) * "e"
		bottles = str(n)
		return bottles + " bottle" + s + " of be" + \
		e + "r on the wall"
	
	def phrase2(n):
		n = str(n + chaos(n))
		return n + " bottles of beer"
	
	def verse(n):
		return phrase1(n) + ", " + phrase2(n) + ".\n" \
		+ (chaos(n) +1) * "You take one down, \n" + "pass it around, \n" \
		+ phrase1(n-1) + "\n"
	
	if (10*bac(n)) > 4.0 :
		print "You drank way too much and died.  Better luck next time."
	else: print verse(n)