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slight golf for the golf (centroid decomp) #210

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Merged
lrvideckis merged 1 commit into from
Apr 12, 2026
Merged

slight golf for the golf (centroid decomp) #210

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4 changes: 2 additions & 2 deletions library/trees/centroid_decomp.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
//! @space O(n)
void centroid(auto& g, auto f) {
vi siz(sz(g));
auto ctd = [&](auto&& ctd, int u, int p, int n) -> int {
auto ctd = [&](auto ctd, int u, int p, int n) -> int {
siz[u] = 1;
for (int v : g[u])
if (v != p) {
Expand All @@ -16,7 +16,7 @@ void centroid(auto& g, auto f) {
}
return 2 * siz[u] >= n ? siz[p] = n - siz[u], u : -1;
};
auto dfs = [&](auto&& dfs, int u, int p, int n) -> void {
auto dfs = [&](auto dfs, int u, int p, int n) -> void {
f(u = ctd(ctd, u, u, n), p);
for (int v : g[u])
erase(g[v], u), dfs(dfs, v, u, siz[v]);
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