elif n==6:
print((6*6+9*9)**0.5)
elif n==8:
print(2*3.141593*5)
print(3.141593*5*5)
print(4/3*3.141593*5*5*5)
elif n==11:
print(100/3)
elif n==13:
v=4/3*3.141593*(4*4+10*10)
print(math.floor(v**(1/3)))