program oken;
uses crt;
var a: array [1..100] of integer;
i,n,s:longint;
begin
clrscr;
write('nhap cac phan tu cua mang: '); readln(n);
for i:=1 to n do
begin
write('a[',i,']: '); readln(a[i]);
if a[i] mod 3=0 then
s:=s+a[i];
end;
write('cac so chia het cho 3: ');
for i:=1 to n do
if a[i] mod 3=0 then
write(a[i],' ');
writeln;
writeln('Tong cac so chia het cho 3 trong mang: ',s);
readln;
end.