Tag: Csa 2018 CSA #69 D - Cover the Tree Sep 13 2018 CSA #66 D - Flipping Matrix Sep 13 2018 CSA #66 C - Counting Quacks Sep 13 2018 CSA #67 E - Hamming Distances Sep 12 2018 CSA #67 D - Falling Balls Sep 12 2018 CSA #86 Water Tower Sep 12 2018 CSA #86 Palindrome Free Strings Sep 12