From db1d685414ac9257082803be8af9b27a088d8938 Mon Sep 17 00:00:00 2001 From: Jesse Luehrs Date: Fri, 15 May 2009 10:05:49 -0500 Subject: mark these old ones as non-working --- 189.lua | 27 --------------------------- 1 file changed, 27 deletions(-) delete mode 100644 189.lua (limited to '189.lua') diff --git a/189.lua b/189.lua deleted file mode 100644 index a4ae546..0000000 --- a/189.lua +++ /dev/null @@ -1,27 +0,0 @@ -local triangle_graph = { -} - ---[[ -http://en.wikipedia.org/wiki/Graph_coloring#Computing_the_chromatic_polynomial -]] -function chromatic_polynomial(g, t) - local edge_start - for v1, edges in ipairs(g) do - for v2index, v2 in ipairs(edges) do - if v1 == v2 then return 0 end - if not edge_start then edge_start = v1 end - end - end - - if edge_start == nil then return t^#g end - - local edge_end = table.remove(g[edge_start]) - local edge_removed = chromatic_polynomial(g, t) - table.insert(g[edge_start], edge_end) - - -- need to contract the edge here - local edge_contracted = chromatic_polynomial(g, t) - -- and then fix it back up - - return edge_removed - edge_contracted -end -- cgit v1.2.3-54-g00ecf