Can anyone help me in converting this GO code in Java?

Question

The Below code is of a question, I want to know whats happening and want to code the same in Java. Please Help me.

Since cannot write the whole code here so, Here's the link to it: pastebin.com/CkrwaaD1
The actual question can also be found at: pastebin.com/VECsn1Zj

Answer 1

Not to do on Sololearn Q&A
https://code.sololearn.com/W26q4WtwSP8W/?ref=app