Question

У

9-
8-
7+
6+
5+
4+
3+
2+
1+
-9 -8 -7 -6 -5 -4 -3 -2
2 3 4 5 6 7 8 9
-2+
-3-
-4+
-5+
-6+
-7+
-8
-9

Answer 1

Where is the problem