uses crt;
var a: array [1..100] of integer;
i,n,dem: integer;
begin
clrscr;
write ('nhap n: '); readln (n);
for i:=1 to n do
begin
write ('nhap a[',i,']: '); readln (a[i]);
if a[i]<>0 then dem:=dem+1;
end;
writeln ('co ',dem,' phan tu khac 0');
readln;
end.