I always have a hard time finding out which data structure to use. After thinking for 1-2hrs, I give up and look at the Disucss/Solutions.\nIt would be a huge help if someone can help me, How to cognise which data structure is required?\n\nHow to change my mindset from " **I can\'t solve to this problem** to " **I can solve this problem** " because after looking at the problem I feel overwhelmed.

I always have a hard time finding out which data structure to use. After thinking for 1-2hrs, I give up and look at the Disucss/Solutions.\nIt would be a huge h