var vxor:array[0..100000]of longint;
    a:array[1..100000,1..100000]of longint;
    n,i,j,max,start, stop,x:longint;
    f,g:text;

begin
     assign(f,'xormax.in');
     assign(g,'xormax.out');
     reset(f);
     rewrite(g);
     read(f,n);
     vxor[0]:=0;
 {(a xor b=c) <=> (a=b xor c) <=> (a xor c=b)}
     for i:=1 to n do
     begin
          read(f,x);
       {   WRITE(g,x,' ');}
          vxor[i]:=vxor[i-1] xor x;
     end;
     max:=0;
{     writeln(g);    }
     for i:=0 to n-2 do
     begin
{      for j:=1 to i do
          write(g,'* ');}
      for j:=i+2 to n do
       begin
        a[i+1,j]:=vxor[i] xor vxor[j];
     {   write(g,a[i+1,j],' ');}
        if (a[i+1,j]=max) and (j<stop) then
        begin
            start:=i+1;
            stop:=j;
        end else
            if (a[i+1,j]=max) and (j-i-1<stop-start) then
            begin
               start:=i+1;
               stop:=j;
            end else
                if a[i+1,j]>max then
                begin
                  max:=a[i+1,j];
                  start:=i+1;
                  stop:=j;
                end;
     end;
{      writeln(g);}
     end;

     write(g,max,' ',start,' ',stop);

     close(f);
     close(g);
end.