uses crt;
var temp,n,i,ti,max,smax,ts,err: longint; tstr: string; z: byte;
begin
    clrscr;
    write('Nhap so luong: ');
    readln(n);
    for i:=1 to n do
    begin
        ti:=1;
        write('A[',i,']=');
        readln(temp);
        str(temp,tstr);
        for z:=1 to length(tstr) do
        begin
            val(tstr[z],ts,err);
            ti:=ti*ts;
            ts:=0;
        end;
        if (ti>max) then
        begin
            smax:=temp;
            max:=ti;
        end;
    end;
    writeln('Ket qua: ',smax);
    readln
end.

Program BT;
Var n,i,max,ln,tong,k :longint;
    a,b : array [1..100] of longint;
Begin
repeat
Write ('Nhap N : ');REadln(n);
until n > 0;
max := 0;

tong := 1;
For i := 1 to n do
Begin
Write ('A[',i,']= ');Readln(A[i]);
b[I] := a[i];
while a[i] <> 0 do
Begin
k := a[i] mod 10;
tong := tong *k;
a[i] := a[i] div 10;
end;
If max <= tong then 
Begin
max := tong ;
ln := b[i];
end;
k := 0;
tong := 1;
end;
Write ('Lon nhat la : ',ln);
end.