these are neetcode’s 150 problems roadmap also the problems are sorted from easy to hard in each section
Floyd’s Cycle Finding Algorithm
A general approach to backtracking questions
LeetCode Problems Roadmap
Array
Stack
Two Pointers
Linked List
Sliding Window
Binary Search
Trees
Tries
Backtracking
Heap / Priority Queue
Graphs
1-D Dynamic Programming
Intervals
Greedy
Advanced Graphs
2-D Dynamic Programming
Bit Manipulation
Math & Geometry