| # | User | Rating |
|---|---|---|
| 1 | tourist | 3690 |
| 2 | jiangly | 3647 |
| 3 | Benq | 3581 |
| 4 | orzdevinwang | 3570 |
| 5 | Geothermal | 3569 |
| 5 | cnnfls_csy | 3569 |
| 7 | Radewoosh | 3509 |
| 8 | ecnerwala | 3486 |
| 9 | jqdai0815 | 3474 |
| 10 | gyh20 | 3447 |
| # | User | Contrib. |
|---|---|---|
| 1 | maomao90 | 174 |
| 2 | awoo | 166 |
| 3 | adamant | 163 |
| 4 | TheScrasse | 160 |
| 5 | nor | 158 |
| 6 | maroonrk | 156 |
| 7 | -is-this-fft- | 152 |
| 8 | SecondThread | 147 |
| 9 | orz | 146 |
| 10 | pajenegod | 145 |
There is a tree that consists of one node(the root) let it be (1).
There is some queries each query is either
find if x is ancestor of y.
make x a son of y(its guaranteed that y exist).
If the first query does not exist its easy to solve it using DFS but I am stuck at finding a solution for the whole problem.
How to solve this?
This problem can be solved using Binary Lifting. I recommend watching the tutorial on Binary Lifting by Algorithms Live! on Youtube if you don't already know it.