Timus
Solve problems from Russian contests on an automatic judge
Timus Online Judge is a large Russian archive of programming problems with automatic judging. You pick a problem, write a console program that reads input and prints output, and submit it. The judge runs it on hidden tests and tells you if it passes. New users start with problem 1000, A+B.
Free · Login needed · Browser · Intermediate
About Timus
Most problems come from contests at Ural Federal University, Ural championships, ICPC regional contests and Petrozavodsk training camps. It trains classic algorithm skills and suits contest players who want hard, well-tested problems.
You register to get a judge ID for your submissions. Languages include C, C++, Pascal, Java, C#, Go, Python, Haskell, Scala, Rust and Kotlin. The site also runs online contests.
On Breakpoint since 23 Oct 2026.