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 114 / 120 1400
Tree distance 2 112 / 112 1500
Tree weight 79 / 84 1600
World tree 13 / 15 2000