Răspuns :
Explicație pas cu pas:
21, 23,25,27,29,31,33,35,37,39
20, 22,24,26,28,30,32,34,36,38,40
81,83,85,87,89,91,93,95,97,99
80,82,84,86,88,90,92,94,96,98,100
sus:21,23,25,27,29,31,33,35,37,39
jos:22,24,26,28,30,32,34,26,38,40
sus:81,83,85,87,89,91,93,95,97,99
jos:82,84,86,88,90,92,94,96,97,98,100
jos:22,24,26,28,30,32,34,26,38,40
sus:81,83,85,87,89,91,93,95,97,99
jos:82,84,86,88,90,92,94,96,97,98,100