Initial commit

10.jl

@@ -0,0 +1,62 @@
+using Pkg
+Pkg.add("Match")
+using Match
+
+include("utils.jl")
+
+function corrupt(line)
+    first, rest... = line
+    check = [first]
+    for char in rest
+        if char in "<{[("
+            push!(check, char)
+        else
+            match, score = @match char begin
+                '>' => ('<', 25137)
+                '}' => ('{', 1197)
+                ']' => ('[', 57)
+                ')' => ('(', 3)
+            end
+            if last(check) == match
+                pop!(check)
+            else
+                return score
+            end
+        end
+    end
+    0
+end
+
+function solution10_1()
+    sum(map(corrupt, non_empty_lines("10.data")))
+end
+
+function fix(line)
+    first, rest... = line
+    check = [first]
+    for char in rest
+        if char in "<{[("
+            push!(check, char)
+        else
+            pop!(check)
+        end
+    end
+    value = 0
+    for char in reverse(check)
+        value *= 5
+        value += @match char begin
+            '<' => 4
+            '{' => 3
+            '[' => 2
+            '(' => 1
+        end
+    end
+    value
+end
+
+function solution10_2()
+    values = sort(map(fix, filter(line->corrupt(line)==0, collect(non_empty_lines("10.data")))))
+    values[div(length(values), 2)+1]
+end
+
+solution10_2()