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/stoerWagner.cpp | 53 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 content/graph/stoerWagner.cpp (limited to 'content/graph/stoerWagner.cpp') diff --git a/content/graph/stoerWagner.cpp b/content/graph/stoerWagner.cpp new file mode 100644 index 0000000..97e667a --- /dev/null +++ b/content/graph/stoerWagner.cpp @@ -0,0 +1,53 @@ +struct Edge { + int from, to; + ll cap; +}; + +vector> adj, tmp; +vector erased; + +void merge(int u, int v) { + tmp[u].insert(tmp[u].end(), all(tmp[v])); + tmp[v].clear(); + erased[v] = true; + for (auto& vec : tmp) { + for (Edge& e : vec) { + if (e.from == v) e.from = u; + if (e.to == v) e.to = u; +}}} + +ll stoer_wagner() { + ll res = INF; + tmp = adj; + erased.assign(sz(tmp), false); + for (int i = 1; i < sz(tmp); i++) { + int s = 0; + while (erased[s]) s++; + priority_queue> pq; + pq.push({0, s}); + vector con(sz(tmp)); + ll cur = 0; + vector> state; + while (!pq.empty()) { + int c = pq.top().second; + pq.pop(); + if (con[c] < 0) continue; //already seen + con[c] = -1; + for (auto e : tmp[c]) { + if (con[e.to] >= 0) {//add edge to cut + con[e.to] += e.cap; + pq.push({con[e.to], e.to}); + cur += e.cap; + } else if (e.to != c) {//remove edge from cut + cur -= e.cap; + }} + state.push_back({cur, c}); + } + int t = state.back().second; + state.pop_back(); + if (state.empty()) return 0; //graph is not connected?! + merge(state.back().second, t); + res = min(res, state.back().first); + } + return res; +} -- cgit v1.2.3