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| 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 /test/graph/kruskal.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 'test/graph/kruskal.cpp')
| -rw-r--r-- | test/graph/kruskal.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/test/graph/kruskal.cpp b/test/graph/kruskal.cpp new file mode 100644 index 0000000..f6245b9 --- /dev/null +++ b/test/graph/kruskal.cpp @@ -0,0 +1,91 @@ +#include "../util.h" +#include <datastructures/unionFind.cpp> + +struct edge { + int from, to; + ll cost; + bool operator<(const edge& o) const { + return cost > o.cost; + } +}; +ll kruskal(vector<edge>& edges, int n) { + init(n); + #define Edge edge + #include <graph/kruskal.cpp> + #undef Edge + return cost; +} + +ll prim(vector<edge>& edges, int n) { + vector<vector<pair<ll, int>>> adj(n); + for (auto [a, b, d] : edges) { + adj[a].emplace_back(d, b); + adj[b].emplace_back(d, a); + } + priority_queue<pair<ll, int>> todo; + vector<bool> seen(n); + ll res = 0; + for (ll i = 0; i < n; i++) { + if (seen[i]) continue; + todo.push({0, i}); + while (!todo.empty()) { + auto [d, c] = todo.top(); + todo.pop(); + if (seen[c]) continue; + seen[c] = true; + res += d; + for (auto e : adj[c]) { + todo.push(e); + } + } + } + return res; +} + +void stress_test() { + ll queries = 0; + for (int tries = 0; tries < 100'000; tries++) { + int n = Random::integer<int>(2, 30); + int m = Random::integer<int>(0, max<int>(n, min<int>(500, n*(n-1) / 2 + 1))); + + + Graph<NoData> g(n); + g.erdosRenyi(m); + vector<edge> edges; + g.forEdges([&](int a, int b){ + ll w = Random::integer<ll>(-1'000'000'000ll, 1'000'000'000ll); + edges.push_back({a, b, w}); + }); + + ll got = kruskal(edges, n); + ll expected = prim(edges, n); + + if (got != expected) cerr << "got: " << got << ", expected: " << expected << FAIL; + queries += n; + } + cerr << "tested random queries: " << queries << endl; +} + +constexpr int N = 500'000; +constexpr int M = 3'000'000; +void performance_test() { + timer t; + Graph<NoData> g(N); + g.erdosRenyi(M); + vector<edge> edges; + g.forEdges([&](int a, int b){ + ll w = Random::integer<ll>(-1'000'000'000ll, 1'000'000'000ll); + edges.push_back({a, b, w}); + }); + + t.start(); + hash_t hash = kruskal(edges, N); + t.stop(); + if (t.time > 1000) cerr << "too slow: " << t.time << FAIL; + cerr << "tested performance: " << t.time << "ms (hash: " << hash << ")" << endl; +} + +int main() { + stress_test(); + performance_test(); +} |