Add 2025 day 6 solutions

2 files changed, 47 insertions, 0 deletions

diff --git a/2025/06/puzzle-1.awk b/2025/06/puzzle-1.awk
new file mode 100755
index 0000000..4bb4338
--- /dev/null
+++ b/2025/06/puzzle-1.awk
@@ -0,0 +1,20 @@
+#!/usr/bin/awk -f
+
+NR == 1 {
+	for (i = 1; i <= NF; i++)
+		xs[i, 2] = 1
+}
+
+!/[+*]/ {
+	for (i = 1; i <= NF; i++) {
+		xs[i, 1] += $i
+		xs[i, 2] *= $i
+	}
+}
+
+/[+*]/ {
+	for (i = 1; i <= NF; i++)
+		total += xs[i, $i == "+" ? 1 : 2]
+}
+
+END { print total }
diff --git a/2025/06/puzzle-2.sh b/2025/06/puzzle-2.sh
new file mode 100755
index 0000000..cba270f
--- /dev/null
+++ b/2025/06/puzzle-2.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+{
+	printf '('
+	for i in $(seq "$(head -n1 input | wc -c)")
+	do
+		num="$(cut -c $i input | paste -sd '')"
+		num="${num%${num##*[![:space:]]}}"
+
+		case "$num" in
+		*[+*])
+			test -n "$op" && printf ') + ('
+			op="${num#${num%?}}"
+			num="${num%?}"
+			printf '%d %s ' $num "$op"
+			;;
+		'')
+			test "$op" = +
+			printf '%d' $?
+			;;
+		*)
+			printf '%d %s ' $num "$op"
+			;;
+		esac
+	done
+	printf ')\n'
+} | bc