08-22 题解 | D. Half Turns 08-12 题解 | F. Traveling 08-08 题解 | K.Great Party 08-05 题解 | I. Board Game 07-29 题解 | A. Falfa with Polygon 07-29 题解 | F. NIO with String Game 07-28 题解 | C. Link with Nim Game 07-28 题解 | E. Falfa with Substring 07-28 题解 | H. Take the Elevator 07-19 题解 | C. Grab the Seat! 07-19 题解 | J. Serval and Essay 07-18 题解 | I. Chiitoitsu