Codeforces Beta Round 16 (Div. 2 Only) D. Logging
Codeforces Beta Round 16 (Div. 2 Only) E. Fish
Codeforces Beta Round 19 B. Checkout Assistant
Codeforces Alpha Round 20 (Codeforces format) C. Dijkstra?
Codeforces Alpha Round 21 (Codeforces format) A. Jabber ID
The weighted graph
Digit cube
The loop problem
Alice’s library
Smallest subarrays