Program hashuri;
const prim=900001;
var t,n,i,a,b,ok: longint;
    lhash : array [0..5000,0..900001] of longint;
    j,k,m : longint;
    bin,bout : array [0..1 shl 17 ] of char;
    nr: array[0..900001] of longint;

begin
    assign(input,'hashuri.in');settextbuf(input,bin);  reset(input);
    assign(output,'hashuri.out'); settextbuf(output,bout); rewrite(output);
    readln(t);
    for m:=1 to t do begin
                           read(a,b);
    case a of
          1 : begin
                   ok:=0;
                   j:=b mod prim;
                   for i:=1 to nr[j] do
                                     if lhash[i,j]=b then begin
                                                               ok:=1;
                                                               break;
                                                           end;
                   if ok=0 then begin
                                     nr[j]:=nr[j]+1;
                                     lhash[nr[j],j]:=b;
                                 end;
              end;

          3 : begin
                   ok:=0;
                   j:=b mod prim;
                   for i:=1 to nr[j] do
                                     if lhash[i,j]=b then begin
                                                               ok:=1;
                                                               break;
                                                           end;
                   writeln(ok);
              end;

          2 : begin
                  j:=b mod prim;
                  for i:=1 to nr[j] do
                      if lhash[i,j]=b then begin
                          for k:=i to nr[j]-1 do lhash[k,j]:=lhash[k+1,j];
                          lhash[nr[j],j]:=0;
                          break;
                          end;
             end;

       end;
                      end;
    close(input);
    close(output);
end.