competitive_library::graph::lowest_common_ancestor_rmq

Struct LowestCommonAncestor

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pub struct LowestCommonAncestor { /* private fields */ }
Expand description

LCA

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impl LowestCommonAncestor

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pub fn new(e: &[Vec<usize>], root: usize) -> Self

§Arguments
  • e - 根付き木の辺集合。隣接リスト
  • root - 根付き木の根
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pub fn get_lca(&self, u: usize, v: usize) -> usize

対象の2頂点のLCAを取得する

§Arguments
  • u - 頂点番号
  • v - 頂点番号
§Returns

LCA

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