### Bovmelo's blog

By Bovmelo, history, 6 weeks ago,

As known, 1720D1 - Xor-Subsequence (easy version) has an ambiguous descriptioin. I'm the one of those who got misled during the contest. However, the misunderstood problem is solutable. Let's have a look.

It is the misunderstood version of the problem. The only difference is that in this version $b_i$ do be the subsequence of $a$, where any $b_i$ is an element of $a$. Note that $a_i<200$ remains true.

Hint 1
Hint 2
Hint 3
solution

However, I had no idea how to solve the misunderstood D2. Could anyone help me?

• +29

 » 6 weeks ago, # |   0 As I promised in my previous comments, I made this blog.