I’m currently working on the 2015 Silver problem ‘Superbull’. I know that the problem is related to trees/graph theory/the like, but I can’t fully connect the dots. This is what I’ve got so far:

```
For my algorithm, I'd first calculate all XOR values of all possible pairs of teams.
I could then use these values to create a kinda graph, tree, etc?
```

I’ve tried continuing from here, but it feels like I’m going into a dead end.

I don’t want to reveal the solution to myself quite yet, as that would ‘waste’ some practice. Could somebody give a hint on this problem? Thanks in advance.