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author | June McEnroe <june@causal.agency> | 2018-12-02 00:28:46 -0500 |
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committer | June McEnroe <june@causal.agency> | 2018-12-02 00:28:46 -0500 |
commit | b3e2e79505a613eee9d4811741ecb379f722bb71 (patch) | |
tree | d40edabd660b18571aff3a6f1b07ab39c363d4b0 /2018 | |
parent | Solve day 1 part 2 (diff) | |
download | aoc-b3e2e79505a613eee9d4811741ecb379f722bb71.tar.gz aoc-b3e2e79505a613eee9d4811741ecb379f722bb71.zip |
Solve day 2 part 1
Diffstat (limited to '2018')
-rw-r--r-- | 2018/day02-1.sh | 19 |
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 |