uses crt;
var a: array[1..20] of real;
min,max: real;
i,n: byte;
begin
clrscr;
write ('nhap so luong phan tu: '); readln (n);
for i:=1 to n do
begin
write ('nhap phan tu thu ',i,': '); readln (a[i]);
end;
max:=a[1];
min:=a[1];
for i:=1 to n do
begin
if a[i]<min then min:=a[i];
if a[i]>max then max:=a[i];
end;
writeln ('so lon nhat: ',max);
writeln ('so be nhat: ',min);
readln;
end.