def ineq_satisfy?(x,s,a)
  ar=100*x.to_f/s.to_f
  (a-0.5<=ar)&&(ar<a+0.5)
end

a,b=gets.split.map(&:to_i)
min=10**9
0.upto(2*a){|x|0.upto(2*b){|y|
  s=x+y
  if ineq_satisfy?(x,s,a)&&ineq_satisfy?(y,s,b)
    min=[s,min].min
  end 
}}

puts min