%EC%95%88%EC%82%B0%EB%A3%B8%EC%8B%B8%EB%A1%B1%E2%91%BE%20%E3%80%90optop10.c%CE%98%D0%BC%E3%80%91%20%EC%95%88%EC%82%B0%ED%9B%84%EB%B6%88%EC%B6%9C%EC%9E%A5%E2%99%98%EC%95%88%EC%82%B0%ED%85%8C%EB%9D%BC%ED%94%BC%20%EC%95%88%EC%82%B0%EC%95%84%EB%A1%9C%EB%A7%88%E2%9C%8F%EC%95%88%EC%82%B0%ED%9C%B4%EA%B2%8C%ED%85%94%20%EC%95%88%EC%82%B0OP