How to implement the Maximum or Minimum Searching Algorithm (QUMMSA) circuit in Quirk?

I am Java and Python programmer who started self-learning Quantum Computing a couple of months back. The journey has been thus far very tough. I have been using QisKit and Quirk to learn by in addition to Khan academy on the Linear Algebra side.

I have now started to dive a little into the deep and and read research and go through the practise of trying replicate circuits on Quirk then QisKit.

I have come accross the followng paper An Optimized Quantum Maximum or Minimum Searching Algorithm and its Circuits

The paper proposes this QUMMSA algorithm to find the minimum or maximum in a dataset.

What I would love to do is replicate the QUMMSA circuit in Quirk with the Titanic experiment written in the paper but with just two inputs.

How do I best implement the circut?