python design-pattern Java GOF baekjoon Algorithm DART short-coding math Flutter dp search Project knapsack Bruteforce problem extension BFS Greedy dfs Factory Get hgu-glocal SRP S1 interpreter SOLID web G5 C 1262번 breadth-first 15723번 tico 3d-renderer abstract-factory factory-method indexed-sequential logical-operator null-safety circular-carousel 2096번 10101번 1193번 1068번 2292번 2579번 1022번 2839번 1065번 Depth-First solved Sequential await Duration Flyweight adaptor Async Carousel DIP pygame i18n then S5 B4 OOP responsive keep Wrapper OCP MEMENTO Future Iterator Decorator g3 Command b2 ISP set Singleton Observer Assembly VCS S4 B1 prototype Asynchronous language synchronous S3 lsp or not AND List