Coding challenges Codility MaxCounters - src/main/scala/MaxCounters.scala PolygonConcavityIndex - src/main/js/PolygonConcavityIndex.js NumberSolitaire - src/main/scala/NumberSolitaire.scala SlalomSkiing - src/main/scala/SlalomSkiing.scala HackerRank SockMerchant - src/main/scala/SockMerchant.scala Offline WaysToSum - src/main/scala/WaysToSum.scala