Problem 44749. Exponents in Factorials(hard)

Created by li haitao

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This is problem is a harder version of "Problem 44747. Exponents in Factorials". https://ww2.mathworks.cn/matlabcentral/cody/problems/44747

It's time to get excited about numbers!!! Well, we're just dealing with factorials here, but it's still a good reason to get excited. You're given two numbers, n and k. Calculate the highest exponent of k that could appear in n!

For example, for n=5 and k=2, you're looking for the highest exponent of 2 that could appear in 5!, or 120. The highest power of 2 that evenly divides 120 is 3 (2^3 evenly divides 120, while 2^4 does not) so your output for maxexp(5,2)=3.

You can assume that both n and k are both integers greater than 1. 1<=n<=1e9, 2<=k<=100.

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Last Solution submitted on Feb 20, 2019

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Solution 1656984

2 Comments

2 Comments

li haitao on 24 Oct 2018

Your solution is the same with mine, from the alogrithm view.
Your code style is MATLAB style, while my solution is C/ C++ style.

Binbin Qi on 24 Oct 2018

Yes, I saw your solution and change it to vector style.

Solution 1656921

5 Comments

5 Comments

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li haitao on 24 Oct 2018

Your solution is the same with mine, even the variable names.
Why?
Are you cheating?

li haitao on 24 Oct 2018

I know, you just copy my solution in "Problem 44747. Exponents in Factorials".

Binbin Qi on 24 Oct 2018

@li haitao, it doesn't matter. It is hard to say James copy your solution. It is possible two codes are same in cody. Even copy, please don't mind. I also copy other's code to solve cody problem.

li haitao on 24 Oct 2018

@Binbin Qi,
I don't mind, I just curious in the beginning.
A few minutes later, I know the reason, but I can not delete the comments, may be there are some bugs in cody sites.

Binbin Qi on 24 Oct 2018

@li haitao, there is a button named Delete which is bule in southeast of the comment box.

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Problem 44749. Exponents in Factorials(hard)

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Problem 44749. Exponents in Factorials(hard)

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Last 200 Solutions

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