submit C.rb to 'C - こだわり者いろはちゃん / Iroha's Obsession' (abc042) [Ruby (2.3.3)]
submit C.rb to 'C - こだわり者いろはちゃん / Iroha's Obsession' (abc042) [Ruby (2.3.3)]

kazunetakahashi/atcoder,kazunetakahashi/atcoder