>>/13492/

Since blockchains have come up several times now:

interdasting datastructures for blockchains and distributed systems

- 

https://en.wikipedia.org/wiki/Merkle_tree

https://en.wikipedia.org/wiki/Linked_timestamping

https://en.wikipedia.org/wiki/Skip_graph
https://en.wikipedia.org/wiki/Skip_list
> QMap (up to Qt 4) template class of Qt that provides a dictionary.
kek

https://en.wikipedia.org/wiki/Merkle%E2%80%93Damg%C3%A5rd_construction