Hi!

In last two codeforces rounds there were two problems where you have to construct something (Link, Link).

I am now looking for these kind of problems. So, if you know any good construction problems, which you enjoyed solving or learnt something new through it, please drop a link to them in the comment section.

If you are confused about what kind of problem I am looking for, well, the problem should contain some restrictions and it should ask to build some array, matrix, tree, graph, etc. meeting those restrictions. It can be from any judge.

Thanks in advance.