program DEMSOCHIAHECHO3;
uses crt;
var i,n,m:integer;
a:array[1..1000] of integer;
begin
clrscr;
m:=0;
write('Nhap n: '); readln(n);
for i:=1 to n do
begin
write('Nhap so thu ',i,': '); readln(a[i]);
if a[i] mod 3 = 0 then m:=m+1;
end;
writeln('Co ',m,' so chia het cho 3');
readln;
end.