import time
import sys
inp=open('in2.txt','r')
i=inp.readline()
inp.close()
p=i.index(",")
x=int(i[0:p])
n=int(i[p+1:len(i)])
j=time.clock()
f=(1-x**n)/(1-x)
output=open('out1.txt','w')
output.write(str(f))
t=time.clock()
output.write('\nTime used='+str(t-j))
output.write('\nNo. of additions=0')
output.write('\nNo. of Multiplications=0')
mem=sys.getsizeof(x)+sys.getsizeof(n)+sys.getsizeof(f)
output.write('\nMemory used='+str(mem))
output.close()