description Problem history Submissions question_mark Qna how_to_vote Vote #5254 upload 245 done 160 how_to_reg 154 Building a bookshelf timer 1s memory 4MB upload Attempts 245 times Solved 160 times Solvers 154 people Acceptance Rate 65.3% monitoring Average Runtime 28.2ms Average Memory 4349.7KB Average Code Length 412.6B No. Submitter Result Time Memory Length Language Submitted