- Q1 - Andryusha and Socks
- Q2 - Second Order Statistics
- Q3 - Thor
- Q4 - Registration System
- Q5 - Soldier and Cards
- Q6 - T-shirt buying
- Q7 - Kostya and Sculptor
- Q1 - Cutting Carrot
- Q2 - Recursive digit sum
- Q3 - Sherlock and his girlfriend
- Q4 - Sherlock and GCD
- Q5 - Simplified Chess Engine