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 --- test/graph/stoerWagner.cpp | 81 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 test/graph/stoerWagner.cpp (limited to 'test/graph/stoerWagner.cpp') diff --git a/test/graph/stoerWagner.cpp b/test/graph/stoerWagner.cpp new file mode 100644 index 0000000..2003f09 --- /dev/null +++ b/test/graph/stoerWagner.cpp @@ -0,0 +1,81 @@ +#include "../util.h" +constexpr ll INF = LL::INF; + +namespace stoerWagner { +#include + void addEdge(int u, int v, ll c) { + adj[u].push_back({u, v, c}); + adj[v].push_back({v, u, c}); + } +} + +namespace pushRelabel { +#include + ll minCut() { + ll res = INF; + for (int i = 0; i < sz(adj); i++) { + for (int j = 0; j < i; j++) { + if (i == j) continue; + res = min(res, maxFlow(i, j)); + for (auto& v : adj) { + for (auto& e : v) { + e.f = 0; + } + } + } + } + return res; + } +} + +void stress_test() { + ll queries = 0; + for (int tries = 0; tries < 5'000; tries++) { + int n = Random::integer(2, 30); + int m = Random::integer(n-1, max(n, min(500, n*(n-1) / 2 + 1))); + + stoerWagner::adj.assign(n, {}); + pushRelabel::adj.assign(n, {}); + + Graph g(n); + g.erdosRenyi(m); + g.forEdges([](int a, int b){ + ll w = Random::integer(1, 1'000'000'000'000ll); + stoerWagner::addEdge(a, b, w); + pushRelabel::addEdge(a, b, w); + pushRelabel::addEdge(b, a, w); + }); + + ll got = stoerWagner::stoer_wagner(); + ll expected = pushRelabel::minCut(); + + if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL; + queries += n; + } + cerr << "tested random queries: " << queries << endl; +} + +constexpr int N = 200; +constexpr int M = 10000; +void performance_test() { + using namespace stoerWagner; + timer t; + Graph g(N); + g.erdosRenyi(M); + adj.assign(N, {}); + g.forEdges([](int a, int b){ + ll w = Random::integer(1, 1'000'000'000'000ll); + addEdge(a, b, w); + }); + + t.start(); + hash_t hash = stoer_wagner(); + t.stop(); + if (t.time > 2000) cerr << "too slow: " << t.time << FAIL; + cerr << "tested performance: " << t.time << "ms (hash: " << hash << ")" << endl; +} + +int main() { + stress_test(); + performance_test(); +} -- cgit v1.2.3