uses crt;
var i,a,k:integer;
begin
clrscr;
k:=0;
for i:=1 to n do
begin
read(a);
if (a < 10) and (a=2) or (a>=10) and (a div 10 = 2) then inc(k);
end;
writeln(k);
readln;
end.
uses crt;
var i,a,k:integer;
begin
clrscr;
k:=0;
for i:=1 to n do
begin
read(a);
if (a < 10) and (a=2) or (a>=10) and (a div 10 = 2) then inc(k);
end;
writeln(k);
readln;
end.