B - マス目と駒
VK Cup 2018 - Round 2 B. Three-level Laser
VK Cup 2018 - Round 3 A. Stairs and Elevators
VK Cup 2018 - Wild-card Round 1 D. Choose Place
Codeforces Round #468 (Div. 1, based on Technocup 2018 Final Round) B. Game with String
ICM Technex 2018 and Codeforces Round #463 (Div. 1 + Div. 2, combined) C. Permutation Cycle
B - 高橋幼稚園
C - Z塗り
D - 高橋君ボール1号
C - 倍々ゲーム