program conductors;
var p,q:real;
    i:longint;
    px,qx:real;
begin
  read(p);
  read(q);
  p:=p/100;
  q:=q/100;
  for i:=1 to 11000 do begin
    px:=p*i;
    qx:=q*i;
    px:=trunc(px)+1;
    if frac(qx)=0 then qx:=qx-1 else qx:=trunc(qx);
    if (px<=qx)and((px/i)>p)and((qx/i)<q) then begin writeln(i);
break; end;
  end;
end.