Kruskal's Algorithm: A Step-by-Step Interview Walkthrough
Minimum Spanning Tree problems are a staple of technical interviews because they sit at the intersection of greedy reasoning and the Union-Find data structure — two things interviewers love to test together. The signal here is whether you understand greedy correctness and can apply Union-Find fluently, not just whether you can recite the steps.
Jun 1011 min read
Cheapest Flights Within K Stops: A Step-by-Step Interview Walkthrough
Cheapest Flights Within K Stops is a problem that looks like a routine shortest-path question, but it quietly adds a twist that breaks the standard tool. The signal interviewers want is whether you can recognize when a familiar algorithm's assumptions are violated and reach for the right variant instead of forcing the wrong tool.
Jun 1013 min read
Critical Connections in a Network: A Step-by-Step Interview Walkthrough
Critical Connections in a Network is a genuinely hard graph problem, the kind where knowing the right algorithm matters more than coding speed. It asks you to find every bridge in a graph — an edge whose removal would split the network into disconnected pieces. It's a problem that rewards understanding the theory, not just pattern-matching.
Jun 914 min read
