From e7c9108b95e39d7ea5a29ae06d619c4727f11027 Mon Sep 17 00:00:00 2001
From: Thomas Voss <thomasvoss@live.com>
Date: Fri, 29 Oct 2021 23:02:39 +0200
Subject: Initial commit

---
 2020/06/puzzle-2.awk | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100755 2020/06/puzzle-2.awk

(limited to '2020/06/puzzle-2.awk')

diff --git a/2020/06/puzzle-2.awk b/2020/06/puzzle-2.awk
new file mode 100755
index 0000000..98224ac
--- /dev/null
+++ b/2020/06/puzzle-2.awk
@@ -0,0 +1,23 @@
+#!/usr/bin/env -S awk -f
+
+BEGIN {
+	RS = ""
+	FS = "\n"
+}
+
+{
+	for (i = 1; i <= NF; i++) {
+		len = split($i, answers, "")
+		for (j = 1; j <= len; j++)
+			count[answers[j]]++
+	}
+
+	for (i in count) {
+		if (count[i] == NF)
+			sum++
+	}
+
+	delete count
+}
+
+END { print sum }
-- 
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