import math
s=str(input())
s1=s.split()
s11=[]
summ=0
for j in range(len(s1)):
   s11.append(float(s1[j]))
print(s11) 
for i in range(len(s1)):
   f=s11[i]*s11[i]
   summ=summ+f
print(math.sqrt(summ))