2020-06-24 23:08:16 +00:00
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---
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id: tree-euler
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title: "Euler Tour on Tree"
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2020-06-26 16:34:41 +00:00
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author: "?"
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2020-06-24 23:08:16 +00:00
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prerequisites:
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- Silver - Depth First Search
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- Gold - Static Range Queries
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- Gold - Point Update Range Sum
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description: Subtree updates and queries and another way to compute lowest common ancestors.
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2020-06-26 16:48:25 +00:00
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frequency: 3
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2020-06-24 23:08:16 +00:00
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---
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import { Problem } from "../models";
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export const metadata = {
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problems: {
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sample: [
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2020-06-25 04:00:28 +00:00
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new Problem("CSES", "Subtree Queries", "1137", "Easy", false, ["Euler-Tree"], "equivalent to https://judge.yosupo.jp/problem/vertex_add_subtree_sum"),
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2020-06-24 23:08:16 +00:00
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new Problem("CSES", "Company Queries II", "1688", "Easy", false, ["LCA"], ""),
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],
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problems: [
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2020-06-25 04:00:28 +00:00
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new Problem("CSES", "Path Queries", "1138", "Easy", false, ["Euler-Tree","PURS"], "equivalent to https://judge.yosupo.jp/problem/vertex_add_path_sum"),
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2020-06-24 23:08:16 +00:00
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new Problem("Gold", "Cow Land", "921", "Normal", false, ["Euler-Tree","PURS"], ""),
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new Problem("Gold", "Milk Visits", "970", "Normal", false, ["Euler-Tree"], ""),
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new Problem("Plat", "Promotion Counting", "696", "Normal", false, ["Euler-Tree","PURS"], ""),
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new Problem("Plat", "Snow-Cow", "973", "Hard", false, ["Euler-Tree","PURS"], ""),
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]
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}
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};
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## Sample Problems
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<problems-list problems={metadata.problems.sample} />
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## Tutorial
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- CPH 18.2
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- [cp-algorithms - LCA with Sparse Table](https://cp-algorithms.com/graph/lca.html)
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## Problems
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<problems-list problems={metadata.problems.problems} />
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