Suggestions on what to work on

[Panphobia]

From the first dwite round to the second one, I was just practising BFS/DFS and all the shortest path algorithms, but then came dwite round 2 and I found that there were no maze/grid questions, and I was tackled with a question that used a greedy algorithm, which I know nothing about. I am just asking, which algorithms should I learn and get familiar with to solve most of the dwite questions?

[Tony]

There isn't a set checklist of algorithms that will be enough to always complete DWITE. You should go back to previous years and take a look at those questions -- there's a bunch of ad-hoc questions. Familiarity with particular algorithms will give you practice and inspiration to approach non-standard problems.