9-10; Preparation takes about one year.
Qualified for USACO Silver or completion of USACO Bronze.
To qualify for next level (USACO Gold) .
This level offers two courses which must be take in order. A general class and a problem solving (PS) class. The general class will consists of lectures as well as basic to medium problems. The PS class will focus on hard problems of the level without lectures and is recommended for advanced students who can consistently solve at least 50% of the problems at this level contests. The topics are as follows:
BitSet, Binary operations & Exhaustive Search
Sorting (Array sort, Class array sort)
Silver Level techniques (FloodFill, RMQ, Prefix Sums)
Data Structures (Stack, Queue, Vector, Set, Map, Priority Queue)
Simulation, Ad-hoc Problems
Depth First Search (DFS)
Breath First Search (BFS)
Intro Graph Theory, Representations, DFS BFS Traversals on Graphs.