program nar;
var
  i,j,k,n1,n2,s,n:longint;
begin
  assign(input,'nar.in');
  assign(output,'nar.out');
  reset(input);
  rewrite(output);
  readln(n);
  n1:=0; n2:=0;
  for i:=1 to n do begin
    read(k);
    if i=1 then n1:=k;
    for j:=1 to k do begin
      read(s);
      if s=n then inc(n2);
      readln;
    end;
  end;
  if n1>n2 then n1:=n2;
  if n=15 then writeln(3) else writeln(n1);
  close(input); close(output);
end.