Nếu có sai thì bạn nói mình nhé.
==============================
program Hello;
uses crt;
var n,i,j,m:integer;
a:array[1..10000] of integer;
begin
read(n);
for i:= 1 to n do
read(a[i]);
for i:=1 to n do
for j:=i+1 to n do
if a[i]<a[j] then
begin
m:=a[i];
a[i]:=a[j];
a[j]:=m;
end;
for i:=1 to n do
write(a[i], ' ');
end.