http://train.usaco.org/usacogate
Background info: I’ve finished all chapters up to Chapter 5.
Here’s a small breakdown:
Chapter 1:
- Section 1.1, 1.2, 1.5: Bronze
- Section 1.3, 1.4: Advanced Bronze, Silver
Chapter 2:
- Section 2.1: Silver
- Section 2.2, 2.3, 2.4: Advanced Silver, Gold
Chapter 3:
- Section 3.1, 3.2: Advanced Silver, Gold
- Section 3.3, 3.4: Gold
Chapter 4:
- Section 4.1, 4.3: Advanced Gold, Platinum
- Section 4.2: Platinum
Chapter 5: (don’t have full details here)
- Convex hull, Heuristics: Platinum
Chapter 6 (practice problems): Platinum
Hope this helps!