Tag: recursive algorithm

You’ve devised a simple encryption method for alphabetic strings that shuffles the characters in such a way that the resulting string is hard to quickly read, but is easy …

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 = , …

Regarding this tool: Get Proxy Votes on Steem Blockchain, In case you might not notice, this tool also returns the indirect proxy supporters. For example, danielhuhservice proxies to der-prophet, …

Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list’s nodes. Only nodes itself may be changed. …

Given a binary tree, you are asked to check whether it is a mirror of itself (i.e, symmetric around its center): https://leetcode.com/problems/symmetric-tree/ For example, this binary tree is symmetric: …