'''
Find the average of 4 subjects of a student
'''

s1=float(input("S1 marks: "))
s2=float(input("S2 marks: "))
s3=float(input("S3 marks: "))
s4=float(input("s4 marks: "))

avg=(s1+s2+s3+s4)/4
print("Average is:",avg)
