I have to write a program to calculate a**b % c where b and c are both very large numbers. If I just use a**b % c, it’s really slow. Then I found that the built-in function pow() can do this really fast by calling pow(a, b, c).
I’m curious to know how does Python implement this? Or where could I find the source code file that implement this function?
Given an input sequence, what is the best way to find the longest (not necessarily continuous) increasing subsequence
In class we are doing sorting algorithms and, although I understand them fine when talking about them and writing pseudocode, I am having problems writing actual code for them.
I have a text file includes over than 10 million lines. Lines like that:
I need to find the longest sequence in a string with the caveat that the sequence must be repeated three or more times. So, for example, if my string is:
I have a list of numbers. I also have a certain sum. The sum is made from a few numbers from my list (I may/may not know how many numbers it’s made from). Is there a fast algorithm to get a list of possible numbers? Written in Python would be great, but pseudo-code’s good too. (I can’t yet read anything other than Python 😛 )
I am thinking of how the in operator implement, for instance
When we sort a list, like
I’m curious as to why it’s so much faster to multiply than to take powers in python (though from what I’ve read this may well be true in many other languages too). For example it’s much faster to do