description Problem history Submissions question_mark Qna how_to_vote Vote #2551 upload 67 done 20 how_to_reg 20 소수 네 개의 합 timer 1s memory - MB upload Attempts 67 times Solved 20 times Solvers 20 people Acceptance Rate 29.9% monitoring Average Runtime 4248.8ms Average Memory 11856.1KB Average Code Length 834.2B No. Submitter Result Time Memory Length Language Submitted