Return any binary tree that matches the given preorder and postorder traversals. Values in the traversals pre and post are distinct positive integers. Example 1: Input: pre = , …
Let’s introduce a concept i.e. witness-voting factor that represent the average witness voting each other in the TOP 20. The maximum value is 20, and the minimal is 0. …
You have a browser of one tab where you start on the homepage and you can visit another url, get back in the history number of steps or move …
How many witnesses are running on 23.1 and how many of them are active? It turns out answering this question does not require preprocess blocks on steem blockchain e.g. …
Blockchain is a fancy word, and not many people understand it. If you want to explain this to your GF/partner, what would be the most simple way? Right, blocks …
In a binary tree, a lonely node is a node that is the only child of its parent node. The root of the tree is not lonely because it …
