Well, I have come across the concepts on invariants. It sounds simple, but its not. I mean sometimes it is, but most times its tricky.

Invariant is a property, which has to remain true at any point during the execution

But its tricky because, you can’t just think of this invariant, it has to fit as well. Sometimes it might look like you have found it but it has to work for all cases.

There are three parts:

• Init: where the invariant gets initialized.
• Body: add/remove things and check and make the invariant property true

There has been two problems, or rather one problem. The brute force, I get it. But even if I kindof can think or feel about what the solution might look like.

The structured way to fill up the blanks is getting difficult. However I have never thought about things in terms of language.

I am more comfortable thinking in code, which seems to be a problem in interviews. The whole process is a mess for me.

I have two ways I am trying to become human:

1. letting the AI build me drills for converting english to code
2. a codeforces blog says, just look at the solutions to a whole bunch of problems and think about them.

So telescoping and immersion. This is something I am really hating man, I wanted to be able to derieve things.