# from turtle import *
#
# size=10
# screensize(2000,2000)
# tracer(0)
# down()
# for i in range(36):
#     fd(10*size)
#     rt(50)
# penup()
# for x in range(-40,40):
#     for y in range(-40,40):
#         goto(x*size,y*size)
#         dot(4,'orange')
# done()
a=0;b=0;c=0
for i in range(10):
    a+=3
    b=a+b
    a=a-b
    a+=3
    b=a+b
    a=abs(a)-b
    c=a+c
    b=0
    b=c
print(c)