program exhibit;
var
  pic:array[1..1000000]of longint;
  man:array[1..2000]of longint;
  maxh,maxf,maxn,h,f,n,picture,artist,i,n2:longint;
begin
  assign(input,'exhibit.in');
  assign(output,'exhibit.out');
  reset(input);
  rewrite(output);
  readln(picture,artist);
  maxn:=-1;
  h:=1;
  fillchar(man,sizeof(man),0);
  n2:=0;
  for i:=1 to picture do
    read(pic[i]);
  readln;
  for i:=1 to picture do
  begin
     if man[pic[i]]=0 then begin
      man[pic[i]]:=1;
      n2:=n2+1;{num of artist}
      n:=n+1;  {num of money}
      f:=i;
    end
    else begin
      man[pic[i]]:=man[pic[i]]+1;
      n:=n+1;  {num of money}
      f:=f+1;
      if pic[h]=pic[i] then begin
        while man[pic[h]]>1 do
        begin
          man[pic[h]]:=man[pic[h]]-1;
          if man[pic[h]]=0 then n2:=n2-1;
          n:=n-1;
          h:=h+1;
        end;
      end;
    end;
    if n2=artist then begin
      if (n<maxn)or(maxn=-1) then begin
        maxn:=n;
        maxh:=h;
        maxf:=f;
      end;
    end;
  end;
  writeln(maxh,' ',maxf);
  close(input);
  close(output);
end.