Program g;
var p,q:real;
    x,i:longint;

    bugy:boolean;
begin
{find function round}
read(p,q);
{p:=round(p/0.01)*0.01;
q:=round(q/0.01)*0.01;}
p:=(int(p/0.01))*0.01;
q:=(int(q/0.01))*0.01;

{writeln(p);

writeln(q);    }
if (p>=0.01)and(q<100) then begin

if (p<q) then begin

bugy:=false;
x:=-1;
repeat
x:=x+1;
for i:=0 to x do
{while i<=x do begin}
if (i>x*p/100)and(i<x*q/100) then bugy:=true;
{i:=i+1;end;}
until (bugy=true);
writeln(x);
end  {else writeln(0);}


end{ else  }

{ writeln('rong');}
{ writeln(q);}
 {writeln(0);}


end.
{why wrong answer}