Plan

Stage 1: Implementation and Greedy

1. 1809A - Garland (implementation, 800)
2. 1807A - Plus or Minus (implementation, 800)
3. 1807B - Grab the Candies (greedy, 800)
4. 1807C - Find and Replace (greedy, implementation, strings, 800)
5. 1798A - Showstopper (greedy, implementation, sortings, 800)
6. 1799A - Recent Actions (data structures, greedy, implementation, math, 800)
7. 1788A - One and Two (brute force, implementation, math, 800)
8. 1778A - Flip Flop Sum (greedy, implementation, 800)
9. 1772A - A+B? (implementation, 800)
10. 1796B - Asterisk-Minor Template (implementation, strings, 1000)

Stage 2: Combinatorics and Geometry

11. 1777A - Everybody Likes Good Arrays! (greedy, math, 800)
12. 1787A - Exponential Equation (constructive algorithms, math, 800)
13. 1777B - Emordnilap (combinatorics, greedy, math, 900)
14. 1773F - Football (constructive algorithms, 800)
15. 1774A - Add Plus Minus Sign (constructive algorithms, math, 800)
16. 1776A - Walking Boy (greedy, 800)
17. 1776L - Controllers (binary search, math, 1500)