from decimal import Decimal,ROUND_HALF_UP
A,B=map(Decimal,input().split())
f=lambda x:x.quantize(Decimal('0'), rounding=ROUND_HALF_UP)
for a in range(201):
  for b in range(201):
    if a==0 and b==0:continue
    a=Decimal(str(a))
    b=Decimal(str(b))
    if A==f(Decimal("100")*a/(a+b)) and B==f((Decimal("100")*b)/(a+b)):
      print(a+b)
      exit()