day 5: should have gone for python for both part

d05/part1.awk

@@ -0,0 +1,29 @@
+NR == FNR {
+  # 47|53
+  #print $0, $1, "before", $2
+  O[$1] = O[$1] $2 ","
+  next
+}
+
+{
+  correct = 1
+  for (i=2;i<=NF;i++) {
+    if ($i in O)
+      split(O[$i],A,",")
+      for(j=1;j<i;j++) {
+        if ($i in O) {
+                if (index(O[$i],$j",")) {
+                    correct = 0
+                }
+        }
+      }
+  }
+  if (!correct) {
+    print
+  }
+  S += correct * $((NF+1)/2)
+}
+
+END {
+        print S > "/dev/stderr"
+}

d05/part2.py

@@ -0,0 +1,30 @@
+import sys
+from collections import defaultdict as dd
+from functools import cmp_to_key as ck
+
+# load rules
+R = dd(list)
+L = open("orders","rt").read().strip().split("\n")
+for l in L:
+  [a,b] = l.split("|")
+  R[int(a)].append(int(b))
+
+
+def order(a,b):
+    if a in R:
+        for i in R[a]:
+            if (i==b):
+                return -1
+    return 1
+
+S = 0
+# load incorrect lines
+I = open("input2","rt").read().strip().split("\n")
+for l in I:
+    # sort line
+    l = map(int,l.split(","))
+    l = sorted(l, key=ck(order))
+    # take middle
+    S += l[(len(l)+1)//2 -1]
+print(S)
+