==> logic/weighing/box.s <==
Number the boxes 0-9.  Take 0 balls from box 0, 1 ball from box 1, 2
balls from box 2, etc.  Now weigh all those balls and follow this
table:

If odd box is	Weight is
0		45 kg
1		44.9 kg
2		44.8 kg
3		44.7 kg
4		44.6 kg
5		44.5 kg
6		44.4 kg
7		44.3 kg
8		44.2 kg
9		44.1 kg