program ct;
uses crt;
var i:integer;
A:array[1..30] of integer;
begin
clrscr;
for i:=1 to 30 do
begin
write('nhap mang A[',i,']:=);readln(A[i]);
end;
for i:=1 to 30 do
if A[i] mod 3=0 then writeln(A[i],' chi het cho 3') else writeln(A[i],' khong chi het cho 3');
readln
end.