Hashing is an important technique in Computer Science. There are many cases that you can use Hash to speed up your algorithms (e.g. by reducing from O(n^2) to O(n) …
Question: Given a positive integer (nature number) N, count the number of ‘1’s between number 1 to N inclusive. For example, when N = 2, the answer is 1, …
I have seen a naive implementation at work today (written by a colleague). My colleague intends to generate a number that is power of two, and the number is …