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kisvadim
Dec '21

The page https://www.spoj.com/info/9 says that “about 13000 tasks available”.
But there are about ~4266 classical problems, ~172 challenge, ~200 partial, ~1516 tutorial, 35 riddle, ~327 basic.
Total: ~6534 tasks.
The page in Wikipedia says "SPOJ (Sphere Online Judge) is an online judge system with over 315,000 registered users and over 20,000 problems. "
How many problems exactly on spoj.com/?

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simes
Jan '22

I don’t know.

How did you arrive at the figure of 4266 for the number of classical problems? There are 78 pages with 50 each, plus a 79th page with 46 = 3946. This ignores hidden problems of course.

The latest classical problem has an ID of 40808 - this suggests there are over 40000 problems in the database, but not all will be real problems, some will not have been made public, some will be hidden etc etc. But that does seem an awful long way from the 6534 you calculate.

kisvadim
Jan '22

You are right, there are 3946 classical problems. I didn’t calculate it correctly.