#Write a program that finds the final score in the song competition. There 
#are 4 judges in the competition. 
#Scoring rules: Each judge submit the score for the song. Assume that 
#the score is an integer, but there is no limit. Could be positive as well 
#as negative, and could be zero. 
#To calculate the final score: the highest score is dropped, and the 
#minimal score is squared and then the average is calculated. 

#Discussion: design top-down 
#functions: 
#max_value - has 4 parameters, scores, return maximal value
#min_value - has 4 parameters, scores, return minimal value
#main function - read input - 4 scores, call functions max_value, 
#min_value and compute a final score:
#((score1+score2+score3+score4)-max_value-min_value+min_value**2)/3

def max_value(score1, score2, score3, score4):

	max_value=score1
	if(score2>max_value):
		max_value=score2
	if(score3>max_value):
		max_value=score3
	if(score4>max_value):
		max_value=score4

	return max_value


def min_value(score1, score2, score3, score4):
	min_value=score1
	if(score2<min_value):
		min_value=score2
	if(score3<min_value):
		min_value=score3
	if(score4<min_value):
		min_value=score4

	return min_value
	

def main():
	score1=int(input("score 1 "))
	score2=int(input("score 2 "))
	score3=int(input("score 3 "))
	score4=int(input("score 4 "))

	max_result=max_value(score1, score2, score3, score4)
	min_result=min_value(score1, score2, score3, score4)

	
	final=((score1+score2+score3+score4)-max_result-min_result+min_result**2)/3
	print(final)

main()