var
a:longint;
p,q:extended;
begin
read(p,q);
p:=p/100;
q:=q/100;
a:=-1;
repeat
inc(a);
until (trunc(a*q-0.0000000000000001)-trunc(a*p+0.0000000000000001))>0;
write(a);
end.

-_-!

#include<iostream>
using namespace std;
int res(int a, int b)
{
    for(int i=1; i<=10001; i++)
    {
        long long x=(i*a);
        long long y=(i*b);
        long long z=((long long)(y/10000))*10000;
        if((x<z)&&(z<y))
        {return i;}
    }
}
int main()
{
    double a,b;
    cin>>a>>b;

    int a1=(int)(100.0*a+0.5);
    int b1=(int)(100.0*b+0.5);
    cout<<res(a1,b1)<<endl;
    return 0;
}