program oken;
uses crt;
var a: array [1..100] of integer;
i,s,n: longint;
begin
clrscr;
write('Nhap so phan tu cua mang A: '); readln(n);
for i:=1 to n do
begin
write('A[',i,']: '); readln(a[i]);
s:=s+a[i];
end;
writeln('TBC cua mang: ',s/n:0:3);
readln;
end.
${Oken}$