5

diff --git a/5/input b/5/input
new file mode 100644 (file)
index 0000000..34edaca
--- /dev/null
+++ b/5/input
@@ -0,0 +1,869 @@
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diff --git a/5/one.icl b/5/one.icl
new file mode 100644 (file)
index 0000000..8eedf88
--- /dev/null
+++ b/5/one.icl
@@ -0,0 +1,23 @@
+module one
+
+import StdEnv
+
+read :: *File -> [[Int]]
+read f
+       # (l, f) = freadline f
+       | l.[size l - 1] <> '\n' = []
+       = [[tobin c\\c<-:l % (0, size l - 2)]:read f]
+where
+       tobin 'B' = 1
+       tobin 'F' = 0
+       tobin 'R' = 1
+       tobin 'L' = 0
+
+Start w
+       # (io, w) = stdio w
+       # ls = read io
+       = (one ls, findHole (sort (map seatNo ls)))
+
+findHole x = hd [b+1\\a<-x & b<-tl x & c<-tl (tl x) | a+1 == b && b+1 <> c]
+one = foldl (\m v->if (v>m) v m) 0 o map seatNo
+seatNo = foldl (\n s->s + 2*n) 0