program chanle;
uses crt;
var n,i:integer;
begin
clrscr;
write('Nhap n: '); readln(n);
writeln('Cac so chan tu 1 den ',n,' la: ');
for i:=1 to n do
if i mod 2=0 then write(i,' ');
writeln;
writeln('Cac so le tu 1 den ',n,' la: ');
for i:=1 to n do
if i mod 2=1 then write(i,' ');
readln
end.