code wars run sdk env ./gradlew cw1157a:test ./gradlew cw1157a:run < input.txt cw1157a cw2037a cw2037b cw2037c cw2037e problems codeforces round 555 (div 3) https://codeforces.com/contest/1157 A. reachable numbers ✅ ... codeforces round 988 (div 3) https://codeforces.com/contest/2037 A. Twice ✅ B. Intercepted Inputs ✅ C. Superultra's Favorite Permutation 🛟 D E. Kachina's Favorite Binary String ⏳ F G. Natlan Exploring ⏳ kotlin heroes 6 https://codeforces.com/contest/1488 A. From Zero To Y reference https://codeforces.com/blog/entry/71089 https://codeforces.com/blog/entry/45307 https://play.kotlinlang.org/byExample/overview https://kotlinlang.org/docs/collections-overview.html https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-list/ https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/set-of.html https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/map-of.html