diff options
| author | mzuenni <mzuenni@users.noreply.github.com> | 2024-07-28 22:54:40 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-07-28 22:54:40 +0200 |
| commit | 8d11c6c8213f46f0fa19826917c255edd5d43cb1 (patch) | |
| tree | 96d75baff33d5a04b5a60f1a41f514a26c716874 /content/graph/LCA_sparse.cpp | |
| parent | 8c33b4e0d3030cfed17fc64b4fe41133339f6d87 (diff) | |
Test (#4)
* update
* moved content in subdir
* rename file
* add test setup
* add test setup
* add github action
* automaticly test all cpp files
* timeout after 10s
* setulimit and dont zero memory
* test build pdf
* install latexmk
* update
* update
* ngerman
* fonts
* removed old code
* add first test
* added tests
* test in sorted order
* more tests
* simplified test
* more tests
* fix suffix tree
* fixes and improvements
* done ust lst directly
* fix swap
* add links to pdf
* fix constants
* add primorial
* add comment
* various improvements
* more tests
* added missing stuf
* more tests
* fix tests
* more tests
* more tests
* more tests
* fix recursion?
* test trie
* more tests
* only use python temporarily for listings
* only use python temporarily for listings
* more tests
* fix longestCommonSubstring
* more tests
* more tests
* made code more similiar
* fix?
* more tests
* more tests
* more tests
* add ahoCorasick test + limit 4GB stack size
* more tests
* fix test
* add additional test
* more tests
* more tests
* fix?
* better fix
* fix virtual tree
* more tests
* more tests
* recursive closest pair
* more tests
* decrease limit
* new tests
* more tests
* fix name
* more tests
* add test
* new test
* more tests
* more tests
* more tests
* more tests
* new test and content
* new code
* new code
* larger tests
* fix and test
* new test
* new test
* update pdf
* remove comments
* new test
* more tests
* more testcases
* more tests
* increased limit
* more tests
* more tests
* more tests
* new tests
* more tests
* shortened code
* new test
* add basic tests for bigint
* more tests
* removed old files
* new test
* ignore some files
* more auto more ccw
* fix test
* more tests
* fix
* new tests
* more tests
* more tests
* stronger test
* actually verify delaunay...
* more tests
* fix header
* more tests
* run tests parallel?
* test parralel?
* add --missing
* separate workflows
* test
* is the pdf checked?
* separate workflows
* fix workflow
* more workflows
---------
Co-authored-by: Yidi <noob999noob999@gmail.com>
Diffstat (limited to 'content/graph/LCA_sparse.cpp')
| -rw-r--r-- | content/graph/LCA_sparse.cpp | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/content/graph/LCA_sparse.cpp b/content/graph/LCA_sparse.cpp new file mode 100644 index 0000000..221b5ed --- /dev/null +++ b/content/graph/LCA_sparse.cpp @@ -0,0 +1,32 @@ +struct LCA { + vector<ll> depth; + vector<int> visited, first; + int idx; + SparseTable st; //sparse table @\sourceref{datastructures/sparseTable.cpp}@ + + void init(vector<vector<int>>& adj, int root) { + depth.assign(2 * sz(adj), 0); + visited.assign(2 * sz(adj), -1); + first.assign(sz(adj), 2 * sz(adj)); + idx = 0; + dfs(adj, root); + st.init(&depth); + } + + void dfs(vector<vector<int>>& adj, int v, ll d=0) { + visited[idx] = v, depth[idx] = d; + first[v] = min(idx, first[v]), idx++; + + for (int u : adj[v]) { + if (first[u] == 2 * sz(adj)) { + dfs(adj, u, d + 1); + visited[idx] = v, depth[idx] = d, idx++; + }}} + + int getLCA(int u, int v) { + if (first[u] > first[v]) swap(u, v); + return visited[st.queryIdempotent(first[u], first[v] + 1)]; + } + + ll getDepth(int v) {return depth[first[v]];} +}; |