How to recover boot partition on macbook pro?

Question

macOS

The background is as follows: I installed os x yosemite on a dedicated disk partition. Then I decided to delete and cleared that partition of the disk through the disk utility. After that, this partition became inaccessible, nothing could be done with it through the gui disk utility.
After that, I decided to merge the partitions through the command line by booting from a USB flash drive. But something went wrong...) and now I can't boot the system in any way. And even from a flash drive, the installation does not go - it writes an error.
The diskutil list command gives the following picture: picture (sorry for the size of the photo, I'm writing from the device)
I remember exactly that disk1 was in the /dev/disk0 partition. Also, there was a recovery section, but it disappeared somewhere :-)
Tell me, how can I get everything back?

Answer 1

Optimistic option:
Boot from a flash drive (can be done on any PC or MAC), start recovery and recover from the time machine image.
Pessimistic option: Same as the optimistic one, but if there are no machine images, try to extract as many valuable files as possible, if there are no backups, then install the system from a USB flash drive and set everything up again.