Concepts2

Category

🔷All∑Math⚙️Algo🗂️DS📚Theory

Level

AllBeginnerIntermediateAdvanced
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#pairwise distances
⚙️AlgorithmIntermediate

Contribution Technique

The contribution technique flips perspective: compute how much each element contributes to the total, then sum these contributions.

#contribution technique#monotonic stack#sum of subarray minimums+12
⚙️AlgorithmAdvanced

Virtual Tree (Auxiliary Tree)

A Virtual Tree (Auxiliary Tree) compresses a large tree into a much smaller tree that contains only the k important nodes and the LCAs needed to keep them connected.

#virtual tree#auxiliary tree#lca+12