Day_22(2023): write-up update

Sheinxy · Dec 22, 2023 · bcd3c4e · bcd3c4e
1 parent fe30deb
commit bcd3c4e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/2023/Day_22/README.md b/2023/Day_22/README.md
@@ -120,7 +120,7 @@ This, however, will also put the ground as an unremovable brick (which is, ultim
 
 ```hs
 getUnremovableBricks :: Input -> S.Set Int
-getUnremovableBricks = S.filter (-1 /=) . M.foldr go S.empty
+getUnremovableBricks = S.delete (-1) . M.foldr go S.empty
    where go cur acc | (S.size . supporting) cur == 1 = acc `S.union` supporting cur
                     | otherwise                      = acc
 ```