case 1 failed: empty candidate output
expected:
971941476
candidate output:

input:
43
1 38 42 21 35 17 23 24 22 10 16 3 2 32 30 26 36 14 20 25 34 31 27 6 37 40 33 9 15 11 13 8 39 43 12 5 7 4 28 18 19 29 41