Activating encoder mode
4 200
0111
0011
0001
0000
? 1 2
<
? 1 3
<
? 1 4
<
? 2 3
<
? 2 4
>
? 3 4
>
! 1 0
? 1 2
Grader gave feedback: Case #1: Invalid node in answer
Grader killed graded software