Algorithm study roadmap: from intuition to a method library

The right roadmap is not just difficulty progression. It is capability progression.

Stage 1

• complexity intuition
• review discipline
• basic structural recognition

Stage 2

• two pointers
• sliding window
• binary search
• monotonic stack
• backtracking

Stage 3

• dynamic programming
• linked lists
• trees
• graphs

Stage 4

• build your own classification system
• build your own mistake catalog
• build your own reusable review template