program T;
uses crt;
var i,N,tong:integer;
a:array [1..1000000] of integer;
begin
clrscr;
write('Nhap N>=250: ');readln(N)
while N<=250 then
begin
write('Nhap lai: ');readln(N)
end;
writeln('Nhap ',N,' so nguyen: ');
for i: = 1 to N do
begin
write('a[',i,'] : ');readln(a[i])
end;
tong:=0;
for i:= 1 to N do
begin
write(a[i],' ');
if a[i] mod 3 = 0 then tong:=tong+1
end;
writeln;
writeln('Tong cac so chia het cho 3 la: ',tong);
readln;
end.