You can also check that how good or bad a complexity is in the options section, just right click on the Big-O icon and then click on options. By this, it becomes a fun and easy way to remember complexities of different programming paradigm. And we all know how important it becomes to have a good grip on various algorithmic complexities ...Given the root of a binary tree, return the postorder traversal of its nodes' values.. Example 1: Input: root = [1,null,2,3] Output: [3,2,1] Example 2: Input: root = [] Output: [] Example 3: Input: root = [1] Output: [1] Constraints: The number of the nodes in the tree is in the range [0, 100].-100 <= Node.val <= 100Get Started Today and Reach Your Coding Goals Faster. Whether you're a beginner or an experienced coder, the Leetcode Spaced-Repetition Tool is the perfect companion to enhance your learning and reach your coding goals faster. So why wait? Get started today and see the results for yourself. Get started.

Given an array of integers nums, sort the array in ascending order and return it.. You must solve the problem without using any built-in functions in O(nlog(n)) time complexity and with the smallest space complexity possible.. Example 1: Input: nums = [5,2,3,1] Output: [1,2,3,5] Explanation: After sorting the array, the positions of some numbers are not changed (for …This weakly contest was organized by Leetcode on 3 Sep 2023. In this contest, there is a total of 4 problem statements and you need to solve this question in a given time slot. 90 minutes are provided to solve these questions. The ranking was based on the following: Maximum score. Minimum time required to solve these questions.Overall much much better than leetcode explore cards but the biggest problem is that the course is very long. I spent 3 months on it and I already am slowly forgetting the material. ... Solve problem from post note and see if the high level steps can get you to a solution. This helps understand the pattern. Skip a day Come back to that problem ...

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