var a,b,c,d,x1,y1,x2,y2 : integer;
begin
assign(input, 'input.txt');
assign(output,'output.txt');
reset(input);
rewrite(output);
readln(x1,y1);
if (x1 = y1) and ((x1 <> 1) or (y1 <> 1))
then writeln(2)
else if (x1 <> 1) or (y1 <> 1)  then writeln(1)
                                else writeln(0)
end.