A characterization of bipartite graphs

[@calimath6701]

In this video, we discussed a lemma about bipartite graphs. If you liked the video, you can watch other videos on our channel or visit our website www.calimath.org, where we organize old problems and solutions. If you have a problem you are interested in, you are welcome to suggest it in the comments.

[@Maths_3.1415]

Make a video on advanced problem 10 of "102 Combinatorial Problems Book by Titu Andreescu and zuming feng " The problem is:- Find the number of subsets of {1,...,2000}, the sum of whose elements is divisible by 5.