From: MikkelFJ Date: 2002-09-03T18:42:08+09:00 Subject: Re: Efficient construction of a L/R minmax tree "Lachlan Pitts" wrote in message news:426B71FE520A87419C9C4E1BBD2F18F27269C6@swa02.softworks.lan.au... > I need an algorithm that paints the entire tree with L and R values such that any ancestor's L and R values strictly bound all its descendants L and R values. (A sort of pre-stored transitive closure approach). You could take a look at R-Trees, but they inherit the complexity of B-Trees http://redbook.cs.berkeley.edu:8000/redbook/lec4.html Sedgewicks book Algorithms in C has a chapter on Range Search - there are some simpler approaches. Mikkel