%EB%8C%80%EA%B5%ACop%E3%8E%80%20%E3%80%90optop10.c%CE%98%D0%BC%E3%80%91%20%EB%8C%80%EA%B5%AC%ED%9B%84%EB%B6%88%EC%B6%9C%EC%9E%A5%20%EB%8C%80%EA%B5%AC%EB%A3%B8%EC%8B%B8%EB%A1%B1%E2%99%9C%EB%8C%80%EA%B5%AC%EC%85%94%EC%B8%A0%EB%A3%B8%20%EB%8C%80%EA%B5%AC%EA%B1%B4%EB%A7%88%E2%9D%88%EB%8C%80%EA%B5%AC%EB%A0%88%EA%B9%85%EC%8A%A4%EB%A3%B8