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Update graph/hld.cc 

Signed-off-by: subcrip <contact@subc.rip>
This commit is contained in:
subcrip 2024-05-13 19:35:55 +08:00
parent 84fbfb21e2
commit c4c02c1b99
1 changed files with 2 additions and 2 deletions
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graph/hld.cc
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@ -2,11 +2,11 @@ namespace HLD {
struct node_info {
int father, depth, hson, size, head, dfn = -1;
};
// returns: (dfs sequence, node info)
// node numbering starts from `1`
// if `dfn(v) == -1`, then node `v` is never accessed.
pair<vector<int>, vector<node_info>> work(int n, const vector<vector<int>>& ch, int root = 0) {
pair<vector<int>, vector<node_info>> work(const vector<vector<int>>& ch, int root = 0) {
int n = ch.size() - 1;
vector<int> seq;
vector<node_info> res(n + 1);
auto dfs1 = [&] (auto dfs1, int v, int pa) -> void {