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| author | Gloria Mundi <gloria@gloria-mundi.eu> | 2024-11-16 01:24:14 +0100 |
|---|---|---|
| committer | Gloria Mundi <gloria@gloria-mundi.eu> | 2024-11-16 01:24:14 +0100 |
| commit | 98567ec798aa8ca2cfbcb85c774dd470f30e30d4 (patch) | |
| tree | 5113d5cc24d1ad5f93810b6442ce584a36950dc8 /graph/test/util.cpp | |
| parent | ad3856a6b766087df0036de0b556f4700a6498c9 (diff) | |
| parent | 8d11c6c8213f46f0fa19826917c255edd5d43cb1 (diff) | |
mzuenni tests
Diffstat (limited to 'graph/test/util.cpp')
| -rw-r--r-- | graph/test/util.cpp | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/graph/test/util.cpp b/graph/test/util.cpp deleted file mode 100644 index 8c14b5c..0000000 --- a/graph/test/util.cpp +++ /dev/null @@ -1,60 +0,0 @@ - -namespace util { - -void shuffle_adj_lists(vector<vector<int>> &adj) { - for (auto &a: adj) ranges::shuffle(a, rd); -} - -vector<vector<int>> random_tree(int n) { - vector<vector<int>> adj(n); - - vector<vector<int>> components(n); - for (int i = 0; i < n; i++) components[i].push_back(i); - while (components.size() > 1) { - int c1 = randint(components.size()); - int c2 = randint(components.size()-1); - c2 += (c2 >= c1); - - int v1 = components[c1][randint(components[c1].size())]; - int v2 = components[c2][randint(components[c2].size())]; - - adj[v1].push_back(v2); - adj[v2].push_back(v1); - - if (components[c1].size() < components[c2].size()) swap(c1, c2); - for (int v: components[c2]) components[c1].push_back(v); - swap(components[c2], components.back()); - components.pop_back(); - } - - shuffle_adj_lists(adj); - return adj; -} - -vector<vector<int>> path(int n) { - vector<vector<int>> adj(n); - for (int i = 1; i < n; i++) { - adj[i-1].push_back(i); - adj[i].push_back(i-1); - } - return adj; -} - -template<typename... Ts> -void shuffle_graph(vector<vector<int>> &adj, Ts &...vertex) { - int n = adj.size(); - vector<int> perm(n); - iota(perm.begin(), perm.end(), 0); - ranges::shuffle(perm, rd); - - vector<vector<int>> new_adj(n); - for (int i = 0; i < n; i++) { - auto &a = new_adj[perm[i]] = move(adj[i]); - for (int &v: a) v = perm[v]; - } - adj = move(new_adj); - shuffle_adj_lists(adj); - ((vertex = perm[vertex]), ...); -} - -} |
