3 files changed, 35 insertions, 0 deletions

diff --git a/2021/10/puzzle-1.sed b/2021/10/puzzle-1.sed
new file mode 100644
index 0000000..e2e1204
--- /dev/null
+++ b/2021/10/puzzle-1.sed
@@ -0,0 +1,13 @@
+:top
+s/()//
+s/\[\]//
+s/{}//
+s/<>//
+t top
+
+/[])}>]/!d
+
+s/^[(\[{<]*).*/3/
+s/^[(\[{<]*\].*/57/
+s/^[(\[{<]*}.*/1197/
+s/^[(\[{<]*>.*/25137/
diff --git a/2021/10/puzzle-2.sed b/2021/10/puzzle-2.sed
new file mode 100644
index 0000000..887386c
--- /dev/null
+++ b/2021/10/puzzle-2.sed
@@ -0,0 +1,18 @@
+:top
+s/()//
+s/\[\]//
+s/{}//
+s/<>//
+t top
+
+/[])}>]/d
+
+:loop
+s/\([(\[{<]*\)($/s = s * 5 + 1;\1/
+s/\([(\[{<]*\)\[$/s = s * 5 + 2;\1/
+s/\([(\[{<]*\){$/s = s * 5 + 3;\1/
+s/\([(\[{<]*\)<$/s = s * 5 + 4;\1/
+t loop
+
+s/^/s = 0;/
+s/$/s/
diff --git a/2021/10/puzzles.sh b/2021/10/puzzles.sh
new file mode 100755
index 0000000..4222f7a
--- /dev/null
+++ b/2021/10/puzzles.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+
+sed -f puzzle-1.sed input | paste -sd+ | bc
+sed -f puzzle-2.sed input | bc | sort -n | sed '27!d'