Is there a way to reduce resistor count in this circuit?

Using Arduino General Electronics
3

So, if I get it, when you read A0 you get:

READING SW7 SW8
0.0V open open
1.7V open closed
2.5V closed open
3.0V closed closed

with Vcc being 5V

as suggested, replace the two series 10k resistors (R3 and R14) with one 20k.