# ДИСПЕРСИЯ
list_data = [int(value) for value in input().split()]
n = len(list_data)
Sum = 0
for value in list_data:
    Sum += value
    SUm=Sum/n
Sum = 0
for value in list_data:
    a = (value - SUm)**2
    Sum += a
    D = (Sum / (n - 1 ))
    print (D)