From 8d11c6c8213f46f0fa19826917c255edd5d43cb1 Mon Sep 17 00:00:00 2001 From: mzuenni Date: Sun, 28 Jul 2024 22:54:40 +0200 Subject: 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 --- content/graph/LCA_sparse.cpp | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 content/graph/LCA_sparse.cpp (limited to 'content/graph/LCA_sparse.cpp') 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 depth; + vector visited, first; + int idx; + SparseTable st; //sparse table @\sourceref{datastructures/sparseTable.cpp}@ + + void init(vector>& 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>& 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]];} +}; -- cgit v1.2.3