''' Purpose : solve geom.py test problem
'''

# get input
reply = input( 'Enter two integers: ' )

# convert input into integers x and n
w1, w2 = reply.split()
x = int( w1 )
n = int( w2 )

# calculate result - follow the given formula
result = 1 + ( 1 - x ** n ) // ( 1 - x )

# print result
print( result )