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Автор Amit_Badshah, история, 6 недель назад, По-английски,

http://codeforces.com/problemset/problem/414/B

Can anyone help me in understand the problem.Just need explaination.Thanks in advance

 
 
 
 
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5 недель назад, # |
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A sequence is called good if all the numbers are divided by its previous number(excluding the first number ofcourse). So a sequence like — 1,4,12,36 is called good but 1,4,8,14 is not good.

Now you will be given n (the maximum number you can use in the sequence) and k (length of sequence). You have to tell how many sequences can be made out of these restrictions.

Solution Hint