「Codeforces 1097D」Makoto and a Blackboard

02-25

「Codeforces 593E」Strange Calculation and Cats

02-24

「Luogu 5196」Cow Poetry

02-17

「Codeforces 1106E」Lunar New Year and Red Envelopes

02-16

「Codeforces 1107E」Vasya and Binary String

02-13

「IOI 2007」矿工配餐

02-09

「Codeforces 1110D」Jongmah

02-08

「Codeforces 900D」Unusual Sequences

02-01

「Codeforces 1102F」Elongated Matrix

01-31

「Luogu 2973」Dotp

01-26