Module Rerooting

Rerooting

**Frequency: 3/10** Reroot the tree to calculate new answer for the new root.

Resources

- [USACO: DP on Trees - Solving For All Roots ](https://usaco.guide/gold/all-roots?lang=cpp)

Problems

Tree distance 100 / 106 1400
Tree distance 2 100 / 100 1500
Tree weight 71 / 75 1600
World tree 11 / 12 2000