var x, y: real;
begin
writeln('x=');
readln(x);
if (x>0) and (x<10) then y:=5*x*x
else y:=(2*(x+5))/3;
write(y);
end.
var x, y: real;
begin
writeln('x=');
readln(x);
if (x>0) and (x<10) then y:=5*x*x
else y:=(2*(x+5))/3;
write(y);
end.