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authorJune McEnroe <june@causal.agency>2018-12-02 00:28:46 -0500
committerJune McEnroe <june@causal.agency>2020-11-22 00:14:25 -0500
commitdb3734cf46f8138c8137e8438e534242860ffee9 (patch)
treef055dc53cd2940f4184007f08837994da0affbf8 /2018
parentSolve day 1 part 2 (diff)
downloadaoc-db3734cf46f8138c8137e8438e534242860ffee9.tar.gz
aoc-db3734cf46f8138c8137e8438e534242860ffee9.zip
Solve day 2 part 1
Diffstat (limited to '')
-rw-r--r--2018/day02-1.sh19
1 files changed, 19 insertions, 0 deletions
diff --git a/2018/day02-1.sh b/2018/day02-1.sh
new file mode 100644
index 0000000..695959f
--- /dev/null
+++ b/2018/day02-1.sh
@@ -0,0 +1,19 @@
+alpha='a b c d e f g h i j k l m n o p q r s t u v w x y z'
+twos() {
+	for a in $alpha; do
+		tr -c -d "$a\n" < $1 \
+			| grep -n '^..$' \
+			| cut -d ':' -f 1
+	done | sort -u | wc -l
+}
+threes() {
+	for a in $alpha; do
+		tr -c -d "$a\n" < $1 \
+			| grep -n '^...$' \
+			| cut -d ':' -f 1
+	done | sort -u | wc -l
+}
+input=$(mktemp)
+cat > $input
+echo $(( $(twos $input) * $(threes $input) ))
+rm $input