procedure bai1;
var
n,n1,temp:integer;
BEGIN
repeat
clrscr;
write('Nhap vao so n=');
readln(n);
if((n>-32000) and (n<32000) )then break;
until (1=1);
n1:=0;
temp:=n;
while temp>0 do
begin
n1:=n1*10 + temp mod 10;
temp:= temp div 10;
end;
if n1=n then writeln('Doi xung')
else
writeln('Khong doi xung');
END;
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