1 array 4 4
2 var 4
3 var 4
4 var 4
5 var 4
6 var 4
7 var 4
8 var 4
9 var 4
10 write 4 4 1 2 3
11 write 4 4 10 4 5
12 write 4 4 11 6 7
13 read 4 12 8
14 read 4 12 9
15 eq 1 8 9
16 eq 1 13 14
17 and 1 15 -16
18 root 1 17