How to find the biggest possible combination of two numbers under a certain threshold from a list? Question: So let’s say if the list is [2,5,14,18,44], what I want to find out is what the biggest sum of two numbers under 60 would be. So the correct answer should be (14,44) Right now I am …
Python effective integer size Question: For example in C#, C++, Java or JavaScript effective int size is 32 bits. If we want to calculate some large number, for example, 70 bits, we should use some software features (Arbitrary-precision arithmetic). Python has a very tricky integer internal boundless representation and I’m can not figure out what …
Why is 2 * x * x faster than 2 * ( x * x ) in Python 3.x, for integers? Question: The following Python 3.x integer multiplication takes on average between 1.66s and 1.77s: import time start_time = time.time() num = 0 for x in range(0, 10000000): # num += 2 * (x * …
Times-two faster than bit-shift, for Python 3.x integers? Question: I was looking at the source of sorted_containers and was surprised to see this line: self._load, self._twice, self._half = load, load * 2, load >> 1 Here load is an integer. Why use bit shift in one place, and multiplication in another? It seems reasonable that …
