Entries from 2016-05-05 to 1 day

HE April Circuits 3B - Bear and Special Dfs ( Timestamp + Segment Tree + Modular Inverse )

https://www.hackerearth.com/april-circuits/algorithm/utkarsh-and-special-dfs/ Modifying some node u, changing a[ u ] to some new value x, the vis count of each node of subtree of u will be divided by the original a[ u ], and multiplied by …