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no comment has asked 22 questions and find answers to 41 problems.

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Why does Python tell me to sort before taking a random sample?
Why is builtin sorted() slower for a list containing descending numbers if each number appears twice consecutively?
Check if list is valid sequence of chunks
How many different sums can we get from very few floats?
How is the s=s+c string concat optimization decided?
Why is any (True for ... if cond) much faster than any (cond for ...)?
What is this odd sorting algorithm?

no comment answers

Understanding Branch Prediction Optimizations in Python
Is there a scenario where `foo in list(bar)` cannot be replaced by `foo in bar`?
A more efficient algorithm in finding the number of distinct decompositions a number has using only repdigits
Knapsack Problem: Find Top-K Lower Profit Solutions
What's the fastest way of skipping tuples with a certain structure in a itertool product?
Radix sort slower than expected compared to standard sort
Find shortest subarrays A[0:L], B[0:L] where M different elements in A are bigger than M different elements in B (time complexity)
Return the indices of "false" values in a boolean array
How do you get 'additional' combinations when adding items to a list that I have already gotten all combinations for?
Lazy evaluation of dict values?