세계도시 랭킹 매기기
Credit to https://www.google.com/search?q=%EC%8B%9C%EB%93%9C%EB%8B%88+%28%ED%98%B8%EC%A3%BC%29+%EB%9E%9C%EB%93%9C%EB%A7%88%ED%81%AC&sca_esv=ac66f5ff5ce53028&rlz for the images.
Credit to https://www.google.com/search?q=%EC%8B%9C%EB%93%9C%EB%8B%88+%28%ED%98%B8%EC%A3%BC%29+%EB%9E%9C%EB%93%9C%EB%A7%88%ED%81%AC&sca_esv=ac66f5ff5ce53028&rlz for the images.