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 96 / 102 1400
Tree distance 2 95 / 95 1500
Tree weight 65 / 69 1600
World tree 10 / 10 2000