• [ ] segment tree
• [ ] binary indexed tree
• [ ] fill longest common substring
• [ ] finalize dp patterns
• [ ] wrap up dp patterns
• [ ] start data structures wrap up
• [ ] Optimised version for maximum product subarray
• [ ] system design problems
• [ ] ds design problems
• [ ] Check List before interview
• [ ] add questions like if you remove from right and left..... to sliding window (or prefix sum)
• [ ] binary search by answer
• [ ] sweep line