1 array 3 3 2 var 3 3 var 3 4 var 3 5 var 3 6 var 3 7 var 3 8 write 3 3 1 2 3 9 write 3 3 1 4 5 10 read 3 8 6 11 read 3 9 7 12 eq 1 2 6 13 eq 1 4 7 14 eq 1 6 7 15 eq 1 10 11 16 and 1 -12 -13 17 and 1 14 16 18 and 1 -15 17 19 root 1 18