Hello, I have onsite interviews for a new grad role in 3 weeks. I have gotten enough time for prep for Phone Screen. So I solved most of the LC Medium questions from various topics like Graphs, Trees, Greedy etc.

Should I focus more on LC Hard? Or more 60-40 ratio of Medium-Hard? Or any particular topic? I have been scratching my head for more than a day to plan what to do :(((
I don't have access to premium and buying premium can cost a lot in INR! Any tips are welcome. This is my Golden chance :)