Alex Hunter

Originally published on LeetCopilot Blog System design confuses beginners. Follow a repeatable learning path, see a mini-example, and get interview-ready by focusing on trade-offs. Why System Design Feels Intimidating at First Having interviewed junior en... See more

Originally published on LeetCopilot Blog Looking for HackerRank alternatives? Here are the best platforms for coding practice, interview prep, and skill assessments—from free options to enterprise solutions. HackerRank is popular for coding challenges and... See more

Originally published on LeetCopilot Blog Three pointers is confusing. Learn the specific 'Partition Invariant' that makes this problem impossible to forget. Sorting arrays of 0s, 1s, and 2s in one pass seems magical until the pointers start crossing. This... See more

Originally published on LeetCopilot Blog Constraints aren't just numbers—they are hints. Here is how to map 10^5 directly to the correct algorithm before you write a single line of code. Rushing into code without estimating time complexity is a common beg... See more

Originally published on LeetCopilot Blog Can you verify your BFS order on a whiteboard? Most candidates can't. Here is the 'Queue Snapshot' technique to trace level-order traversal without getting lost. Many BFS explanations jump straight to code, leaving... See more