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Articles tagged with #codeintuition
You can write recursive inorder in your sleep. Three lines and a base case. Then an interviewer asks for the iterative version, and the clean recursion you leaned on becomes a puzzle about when to pus
You've solved 50 tree problems. You know what preorder, postorder, inorder, and level order mean. On problem 51 your interviewer hands you something unfamiliar and you have 35 minutes. You sketch the
You sort LeetCode's tree tag by frequency, pick the top forty, and start grinding. Three weeks in, tree problems still feel unpredictable. The recursive ones blur together. Level order problems feel l
You learn that a binary search tree gives you O(log n) search, insertion, and deletion. Then you feed it a sorted array of timestamps from a log and the tree degenerates into a linked list. Every sear
You've read three Big O articles this week. You can recite that hash map lookups are O(1) amortised, that merge sort is O(n log n), that nested loops are O(n²). Then your interviewer writes a function
You run a graph traversal, it visits every node, and the tests pass. Then a problem asks for the shortest path and your answer comes back a few steps too long. Or it asks you to detect a cycle and you
