Contributed onboarding improvements to the hyemi0622/algorithm repository by developing accessible, cross-language demonstration programs. Focused on creating introductory Hello World examples in both C and Java, including a C program named 'nano' and a Java program Problem1jinhun.java, to help new contributors ramp up quickly. Enhanced the consistency of onboarding materials by updating the nano file to better reflect Java context, ensuring clarity across language examples. Emphasized basic programming concepts and documentation scaffolding to make the codebase more approachable. The work centered on basic C programming and Java, with an emphasis on clear, language-agnostic examples rather than complex feature development.