# coding: utf-8
#yuki_338
import sys

ep=0.000001

def myround(n1,n2):
 x1=100.0*n1/(n1+n2)
 y1=x1+0.5
 z1=int(y1+ep)
 x2=100.0*n2/(n1+n2)
 y2=x2+0.5
 z2=int(y2+ep)
 return z1,z2

s=map(int,raw_input().split())
a=s[0]
if a==0:
 print 1
 sys.exit()
b=s[1]
if b==0:
 print 1
 sys.exit()
for i in xrange(1,201):
 for j in xrange(1,201):
  z1,z2=myround(i,j)
  if z1==a and z2==b:
   print i+j
   sys.exit()