Eratosthenes 썸네일형 리스트형 Prime Path http://acm.pku.edu.cn/JudgeOnline/problem?id=3126 Description The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices. — It is a matter of security to change such things every now and then, to keep the enemy in the dark. — But look, I have chosen my number 1033 for good reasons.. 더보기 이전 1 다음