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Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 31790 Accepted Submission(s): 7786

Problem Description

��ˮ��ʱ��й��ɣ��ǵ�һ�Σ�ͣһ�£�Ȼ��ζ��Σ�ͣһ�£��ٵ��Σ�ͣһ��...��һ��⣺��ƿ��ˮһ��VUL��ÿһ��D��ÿһ�ε��ٶ��һ�루��һ�β��D��򻨷ѵ�ʱ��Ҳ��һ�룩��ͣһ�µ�ʱ��Ҳ��һ��ƿˮʲôʱ��ܹ��أ�

Input

��ݰ��ʵ��ÿ��ʵ��ռһ�У��VUL��D��ɣ�� 0<D<VUL<5000��

Output

��ÿ��ݣ��ˮ��Ҫ��ʱ�䣬ÿ��ʵ��ռһ�С�

Sample Input

10 1

Sample Output

Author

lcy

Source

��ACM��ѵ��ѵ��IV��

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