Blind 75 Tracker

Blind 75 is a revision list, not a course. It works because the 75 problems map onto about fifteen patterns that interviewers reuse endlessly, so finishing it leaves you able to recognise a problem shape in the first minute rather than the fifteenth.

Go topic by topic in the order below rather than jumping around. Arrays and hashing first, then two pointers and sliding window, because almost everything later assumes you are comfortable scanning an array with two indices. Graphs and dynamic programming last, when you have the stamina for them.

Give each problem twenty five minutes. If you have not found the approach by then, read the editorial, understand it properly, then mark the problem for revision and move on. The mistake is sitting on one hard problem for two hours and calling it a productive evening.

Revise on a three day gap. A problem you understood on Monday and cannot reproduce on Thursday was never learned, and finding that out in week three is much better than finding it out in an interview.

Who this suits. Anyone with four to eight weeks before interviews who already knows the basics of arrays, recursion and hash maps.

Who it does not. Complete beginners. Blind 75 assumes you can already write a loop and a recursive function without looking things up.