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Fix Euler Tour Tree #19

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Fix Euler Tour Tree #19

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6 changes: 4 additions & 2 deletions graph/euler_tour_tree.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -97,8 +97,10 @@ struct euler_tour_tree {
return uv;
}
void cut(node *uv) {
splay(uv); disconnect(uv,1); splay(uv->r);
join(disconnect(uv,0), disconnect(uv->r,1));
splay(uv->r); splay(uv);
int d = 0; for (auto ptr = uv->r; ptr != uv; ptr = ptr->p) d = dir(ptr);
disconnect(uv,d); splay(uv->r);
join(disconnect(uv,!d), disconnect(uv->r,d));
delete uv, uv->r;
}
int sum_in_component(node *u) {
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