PayPal Code challenge was organized the first time in 2015, with over 100 people registered.
Contest information can be found here.
- HQ9+ (implementation skill)
- Black White (basic implementation skill)
- Four (Smart brute force)
- Moving Stone (Greedy)
- Pet Detective (BFS/Dijkstra)
- Jumping Around (math, probability, dynamic programming)
- Inversion (2D Fenwick tree / divide & conquer + Fenwick tree)
- Magic square