program oken;
uses crt;
var a: array[1..100] of integer;
i,j,tg,n: integer;
begin
clrscr;
write('Nhap so phan tu cua mang: '); readln(n);
for i:=1 to n do
begin
write('a[',i,']: ');
readln(a[i]);
end;
for i:=1 to n-1 do
for j:=i+1 to n do
if a[i]<a[j] then
begin
tg:=a[i];
a[i]:=a[j];
a[j]:=tg;
end;
writeln('phan tu lon thu 2: ',a[2]);
for i:=1 to n-1 do
for j:=i+1 to n do
if a[i]>a[j] then
begin
tg:=a[i];
a[i]:=a[j];
a[j]:=tg;
end;
writeln('Phan tu nho thu 2: ',a[2]);
readln;
end.