1 is the right answer.
initial value = 1
now when then we have 9P()
9P() will make S=0 (because only one 1 down operation will take place at a time ).
similarly, 14V() make S = 1 (because only one 1 up operation will take place at a time)
6P() makes S= 0
8V() makes S = 1
3P() makes S= 0
2V() makes S = 1
thus final value of s = 1