day 5 part 1

day05/sample1.in

@@ -0,0 +1,28 @@
+47|53
+97|13
+97|61
+97|47
+75|29
+61|13
+75|53
+29|13
+97|29
+53|29
+61|53
+97|53
+61|29
+47|13
+75|47
+97|75
+47|61
+75|61
+47|29
+75|13
+53|13
+
+75,47,61,53,29
+97,61,53,29,13
+75,29,13
+75,97,47,61,53
+61,13,29
+97,13,75,29,47

day05/sample2.in

@@ -0,0 +1,3 @@
+75,47,<em>61</em>,53,29
+97,61,<em>53</em>,29,13
+75,<em>29</em>,13

day05/sol.py

@@ -0,0 +1,42 @@
+import functools
+
+def parse(file):
+    rules = []
+    for line in file:
+        line = line.strip()
+        if line == "":
+            break
+        a, _, b = line.partition('|')
+        rules.append((a,b))
+    updates = []
+    for line in file:
+        line = line.strip()
+        updates.append(line.split(','))
+    return rules, updates
+
+def solve(file):
+    rules, updates = parse(file)
+    rules = set(rules)
+    def isvalid(pages):
+        for i in range(len(pages)):
+            p = pages[i]
+            for g in pages[i+1:]:
+                if (g,p) in rules:
+                    return False
+        return True
+
+    t = 0
+    invalid = []
+    for pages in updates:
+        if isvalid(pages):
+            print(pages)
+            t += int(pages[len(pages)//2])
+        else:
+            invalid.append(pages)
+    print(t)
+
+
+        
+            
+solve(open("sample1.in"))
+solve(open("input"))