X-Git-Url: https://git.njae.me.uk/?a=blobdiff_plain;f=advent05%2FMain.hs;h=d8bb80651619e20b6408db47ece5cfb9e999f897;hb=3af07db033456d04a8c0f307b20fc6ca0ffcba9e;hp=17e38bd384c0d4fcff8e75dc98f150e46939f035;hpb=294c56539984358d1043c6c2bf7ae1f28eb88dff;p=advent-of-code-23.git

diff --git a/advent05/Main.hs b/advent05/Main.hs
index 17e38bd..d8bb806 100644
--- a/advent05/Main.hs
+++ b/advent05/Main.hs
@@ -39,7 +39,7 @@ lowestLocation almanac seeds = l
         (Iv l _) = head locations
 
 followRequirements :: Almanac -> Requirement -> Requirement
-followRequirements _ req@(Requirement "location" vals) = req
+followRequirements _ req@(Requirement "location" _) = req
 followRequirements almanac (Requirement name vals) = 
   followRequirements almanac newReq
   where aMap = almanac ! name
@@ -61,9 +61,9 @@ useRule (Rule (Iv rl rh) d) (Iv xl xh) = (newResults, newVals, newRules)
 useRules :: [Rule] -> [Interval] -> [Interval]
 useRules [] vals = vals
 useRules _ [] = []
-useRules (r@(Rule (Iv rl rh) _):rs) (v@(Iv xl xh):vs)  
-  | rh < xl = useRules rs (v:vs)
-  | xh < rl = v : useRules (r:rs) vs
+useRules (r@(Rule rv _):rs) (v:vs)  
+  | rv `allBelow` v = useRules rs (v:vs)
+  | v `allBelow` rv = v : useRules (r:rs) vs
   | otherwise = newResults ++ (useRules (newRules ++ rs) (newVals ++ vs))
   where (newResults, newVals, newRules) = useRule r v
 
@@ -87,7 +87,7 @@ expandRanges seeds = fmap expandRange ranges
 
 
 tidyIntervals :: [Interval] -> [Interval]
-tidyIntervals ivs0 = tidyIntervalsS $ sort ivs0
+tidyIntervals = tidyIntervalsS . sort
 
 tidyIntervalsS :: [Interval] -> [Interval]
 tidyIntervalsS [] = []