English version is in beta. All contents of the site should be already translated (mostly using machine translation), and everything should work properly. However, if you find any problems, please contact me.

Level 2

*Additional notes on python
GCD, Euclidean algorithm
Prefix sums and related topics
Recursion
*Backtracking (recursive search)
Complexity of algorithms
Basics of dynamic programming
"Technical" problems
Prime numbers and factorization
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