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盐水的故事

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 31665    Accepted Submission(s): 7763


Problem Description
挂盐水的时候,如果滴起来有规律,先是滴一滴,停一下;然后滴二滴,停一下;再滴三滴,停一下...,现在有一个问题:这瓶盐水一共有VUL毫升,每一滴是D毫升,每一滴的速度是一秒(假设最后一滴不到D毫升,则花费的时间也算一秒),停一下的时间也是一秒这瓶水什么时候能挂完呢?
 

Input
输入数据包含多个测试实例,每个实例占一行,由VUL和D组成,其中 0<D<VUL<5000。
 

Output
对于每组测试数据,请输出挂完盐水需要的时间,每个实例的输出占一行。
 

Sample Input
10 1
 

Sample Output
13
 

Author
lcy
 

Source
 

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