#M1/31
'''
from math import sqrt, pi
S = float(input())
D = sqrt(S * 4 / pi)
L = pi * D
print(D)
print(L)
'''
#M1/32
'''
k = 0
a = int(input())
while a != 0:
    k += 1
    a = int(input())
print(k)
'''
#M1/33
'''
A = int(input())
B = int(input())
if A != B:
    A, B = A + B, A * B
else:
    A, B = 0, 0
print(A)
print(B)
'''
#M1/34
'''
Wizard_list = ["паучьи лапки",
               "жабий палец",
               "язык улитки",
               "крыло летучей мыши",
               "жир слизня",
               "медвежий коготь"]
i = 0
while i < len(Wizard_list):
    print(Wizard_list[i])
    i += 1
'''

#M1/35
'''
k = int(input())
n = int(input())
for i in range(n):
    print(k)
'''

#M1/36
'''
s = []
for i in range(10):
    s.append(float(input()))
ts = 0
i = 0
while i < 10:
    ts += s[i]
    i += 1
print(ts / 10)
'''