Răspuns :
+1 +1 +1 +1
0------1--------2--------3--------4
-1 - 1 -1 -1
10--------9----------8---------7--------6
+1 +1 -1
5------------6------------7-----------6
+1 +1 +1 +1
0------1--------2--------3--------4
-1 - 1 -1 -1
10--------9----------8---------7--------6
+1 +1 -1
5------------6------------7-----------6