164 here. I did it on and off for many many years. Personally I don't think there is much value in grinding these. It's rather a fun pastime every now and then.
That said, I believe the 100-150 easiest (i.e. solved by the most people) problems are all OK. Many of them take one hour or less. I think, it never took more than a weekend for one.
Many of the ~2006 problems can be brute forced nowadays with a low level language, which makes them quite a bit easier.
That said, I believe the 100-150 easiest (i.e. solved by the most people) problems are all OK. Many of them take one hour or less. I think, it never took more than a weekend for one.
Many of the ~2006 problems can be brute forced nowadays with a low level language, which makes them quite a bit easier.