Merge branch 'day4-1'
authorsgf <sgf.dma@gmail.com>
Fri, 24 Dec 2021 21:01:30 +0000 (00:01 +0300)
committersgf <sgf.dma@gmail.com>
Fri, 24 Dec 2021 21:01:30 +0000 (00:01 +0300)

Trivial merge