3 ms·
> How the heck that helps If you look at the solution, you'll see how the idea of a derivative helps in that problem.
by sampo 9y ago
> How the heck that helps
If you look at the solution, you'll see how the idea of a derivative helps in that problem.
- imogold 9y agoLet's put this in the context: the article is about problems which are supposedly killer problems because they require some hard-to-get hint to solve. Therefore, a hint is low quality, if another hint exists that is simpler, more elementary, or the problem is solved straightforward anyway. In this case, a simpler hint is: "Do not use derivatives or anything fancy really. Only solutions are constant functions. Proof by contradiction. Use binary search". One may only wonder what level were the problems given to regular candidates.