day 15 part 2
commit183d2c39282590217779eac87952d9aa88181059
authorEric Blake <eblake@redhat.com>
Fri, 15 Dec 2023 22:24:07 +0000 (15 16:24 -0600)
committerEric Blake <eblake@redhat.com>
Fri, 15 Dec 2023 22:24:36 +0000 (15 16:24 -0600)
tree3afd74180340024ba27a91b615bb1195e24523cc
parent75c9fea7959c1f826d523eb00f126efc34c0e386
day 15 part 2

~250ms GNU, ~300ms POSIX.  Pushdef stacks take some fiddling to set
up, but ultimately did what I needed.
2023/day15.m4