submit B.rb to 'B - AtCoDeerくんとボール色塗り / Painting Balls with AtCoDeer' (abc046) [Ruby (2.3.3)]
submit B.rb to 'B - AtCoDeerくんとボール色塗り / Painting Balls with AtCoDeer' (abc046) [Ruby (2.3.3)]

kazunetakahashi/atcoder,kazunetakahashi/atcoder