uses crt;
var a:array[1..100]of integer;
n,i:integer;
s:real;
begin
clrscr;
write('Nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
s:=1;
for i:=1 to n do
s:=s*a[i];
writeln('Tich cac phan tu la: ',s:0:0);
readln;
end.