description Problem history Submissions question_mark Qna how_to_vote Vote #4889 upload 244 done 161 how_to_reg 155 속이 빈 사각형 3 timer 1s memory 128MB upload Attempts 244 times Solved 161 times Solvers 155 people Acceptance Rate 66.0% monitoring Average Runtime 22.1ms Average Memory 3498.8KB Average Code Length 446.5B No. Submitter Result Time Memory Length Language Submitted