From aaece858e772a505f4c92c067f087ff892eb9000 Mon Sep 17 00:00:00 2001
From: setop <setop@zoocoop.com>
Date: Sun, 4 Dec 2022 17:57:20 +0100
Subject: [PATCH] day 3, part 1 in awk and compat part 2

---
 d03/part1.awk | 12 ++++++++++++
 d03/part2.awk | 26 +++++++-------------------
 2 files changed, 19 insertions(+), 19 deletions(-)
 create mode 100644 d03/part1.awk

diff --git a/d03/part1.awk b/d03/part1.awk
new file mode 100644
index 0000000..2627988
--- /dev/null
+++ b/d03/part1.awk
@@ -0,0 +1,12 @@
+{
+	split(substr($0,1,length($0)/2),arr,"")
+	r = substr($0,1+length($0)/2)
+	for (a in arr) {
+		c = arr[a]
+		if (index(r,c)>0) {
+			comm = c
+		}
+	}
+	S += index("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ", comm)
+}
+END {print S}
diff --git a/d03/part2.awk b/d03/part2.awk
index 7e003a7..bcaae31 100644
--- a/d03/part2.awk
+++ b/d03/part2.awk
@@ -1,25 +1,13 @@
-NR %3 == 1 { split($0, arr, "") 
-	for (a in arr) {
-		A[arr[a]]=1
-	}
-}
-NR %3 == 2 { split($0, arr, "") 
-	for (a in arr) {
-		B[arr[a]]=1
-	}
-}
-NR %3 == 0 {
-	split($0, arr, "")
+NR%3==1 {split($0,arr,"");for(a in arr){A[arr[a]]=1}}
+NR%3==2 {split($0,arr,"");for(a in arr){B[arr[a]]=1}}
+NR%3==0 {
+	split($0,arr,"")
 	for (a in arr) {
 		c = arr[a]
-		if ((c in A) && (c in B)) {
-			comm = c
-		}
+		if ((c in A)&&(c in B)) {comm = c}
 	}
-	i = index("abcdefghijklmnopqrstuvwxyz", comm)
-	j = index("ABCDEFGHIJKLMNOPQRSTUVWXYZ", comm)+26
-	S += i > 0 ? i : j
+	S += index("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ", comm)
 	delete A
 	delete B
 }
-END { print S}
+END {print S}