Program dreamcraft375;
var a: array[1..32000] of integer;
i,n: integer;
t: longint;
begin
write('Nhap so phan tu cua day : '); readln(n);
for i:=1 to n do
begin
write('Nhap so thu ',i,' : '); readln(a[i]);
end;
t:=0;
for i:=1 to n do
if (a[i]>0) and (a[i] mod 3=0) then t:=t+a[i];
write('Tong cac so duong chia het cho 3 la : ',t);
readln
end.