Var
x, y: integer;
begin
readln(x, y);
if ((sqrt(sqr(x) + sqr(y)) <= 1) or ((x in [0..1]) and (y in [0..1]))) then<br> writeln('yes')
else
writeln('no');
end.
--------------------------
var
x, y: integer;
begin
readln(x, y);
if (sqrt(sqr(x) + sqr(y)) <= 1) then<br> writeln('yes')
else
if (x in [0..1]) then
if (y in [0..1]) then
writeln('yes')
else
writeln('no')
else
writeln('no');
end.