Resources to reach Expert in CF

Number Theory

1. - CodeNCode Number Theory Playlist
2. - CP Algorithms Algebra Section
3. - Utkarsh Gupta Quick Number Theory Video

Binary Search

1. - Codeforces Edu Section (Binary Search)
2. - Priyansh Agarwal Quick Binary Search Video
3. - CP Algorithms Ternary Search

Greedy 

1. - Geeks for Geeks Standard Greedy Problems
2. - Exchange Arguments Algorithms Live Video
3. - CSES Problemset (Try first 50% problems from Searching and Sorting Section)

Dynamic Programming

1. - Errichto’s DP Beginner Videos
2. - CSES Problemset (Try first 60% problems from DP Section)
3. - Kartik Arora’s DP Playlist
4. - AtCoder DP Contest (Try first 10 problems)
5. - Utkarsh Gupta’s AtCoder Solutions (Hindi)

Trees

1. - Tree Video 1, Tree Video 2 on Priyansh Agarwal Channel
2. - Galen Collins Trees Topic Stream
3. - Errichto Binary Lifting Video
4. - CSES Problemset (Try first 6 problems from Trees Section)

Graphs

1. - Galen Collins Graphs Topic Stream
2. - William Fiset Graph Theory Playlist
3. - CSES Problemset (Try first 8 problems from Graphs Section)

Practice Links from 1200 - 1400 on Codeforces:

1. Implementation/Constructive: link
2. Math: link
3. Binary Search: link
4. prime (number theory): link 
5. bitmask: link
6. stacks & queues: link
7. strings: link, TUF Strings
8. Trees: Cses, link
9. graphs: link
10. DP: link