From c8c36a069e2771aca576243cebf2823d5dbd5472 Mon Sep 17 00:00:00 2001
From: setop <setop@zoocoop.com>
Date: Sat, 3 Dec 2022 16:01:59 +0100
Subject: [PATCH] day 3

---
 d03/part1.py  | 16 ++++++++++++++++
 d03/part2.awk | 25 +++++++++++++++++++++++++
 d03/part2.py  | 18 ++++++++++++++++++
 3 files changed, 59 insertions(+)
 create mode 100644 d03/part1.py
 create mode 100644 d03/part2.awk
 create mode 100644 d03/part2.py

diff --git a/d03/part1.py b/d03/part1.py
new file mode 100644
index 0000000..6fe8bbe
--- /dev/null
+++ b/d03/part1.py
@@ -0,0 +1,16 @@
+import sys
+
+def p(c):
+	o = ord(c)
+	if o > 96:
+		return o-96
+	else:
+		return o-64+26
+
+def gen():
+	for line in sys.stdin:
+		(l,r) = line[:len(line)//2], line[len(line)//2:-1]
+		b = set(l) & set(r)
+		yield list(b)[0]
+
+print(sum(p(c) for c in gen()))
diff --git a/d03/part2.awk b/d03/part2.awk
new file mode 100644
index 0000000..7e003a7
--- /dev/null
+++ b/d03/part2.awk
@@ -0,0 +1,25 @@
+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
+		}
+	}
+	i = index("abcdefghijklmnopqrstuvwxyz", comm)
+	j = index("ABCDEFGHIJKLMNOPQRSTUVWXYZ", comm)+26
+	S += i > 0 ? i : j
+	delete A
+	delete B
+}
+END { print S}
diff --git a/d03/part2.py b/d03/part2.py
new file mode 100644
index 0000000..510bf46
--- /dev/null
+++ b/d03/part2.py
@@ -0,0 +1,18 @@
+import sys
+
+def p(c):
+	o = ord(c)
+	if o > 96:
+		return o-96
+	else:
+		return o-64+26
+
+def gen():
+	for _ in range(100):
+		g1 = next(sys.stdin)[:-1]
+		g2 = next(sys.stdin)[:-1]
+		g3 = next(sys.stdin)[:-1]
+		b = set(g1) & set(g2) & set(g3)
+		yield list(b)[0]
+
+print(sum(p(c) for c in gen()))