Description: Spacetime provides tutorials, news and programming tips in data structures, algorithms and python to help you pass an interview or a coding competition. It also provides trends, sports such as cricket and footbal news and also the latest headlines.
Many problems are disguised as combinatorics and can be easily solved using Fibonacci numbers.
If the array is sorted, then the frequency of any element can be found easily by using binary search.
A simple recursive approach to construct a binary tree from its traversals