uses crt;
var a:array[1..100] of integer;
i,x,y,n:integer;
begin
write('Nhap n:');readln(n);
for i:=1 to n do
begin
write('a[',i,']:');
readln(a[i]);
end;
for i := 1 to n do
begin
if a[i] mod 3 =0 then x:=x+a[i];
if a[i]>0 then inc(y);
end;
writeln('Tong cac phan tu chia het cho 3:',x);
write('So cac so duong:',y);
readln
end.