Rankings updated with difficulty weights. Challenges now carry a difficulty weight (1x–4x) that multiplies badge points on the rankings page. Harder challenges like Event Scheduler (4x) and Multi-Book (3x) are worth more than entry-level ones like Order Book (1x). Weights are shown on each challenge page.
Challenge 06 (Seqlock) rebalanced. The benchmark has been redesigned with a new composite metric (A+B+median C). All scores have been reset and submissions requeued. Previous scores are not comparable to the new metric. Badge thresholds updated: gold ≤350, silver ≤400, bronze ≤500.
C++23 is here. The sandbox now uses GCC 14 with full C++23 support — deducing this, std::forward_like, std::expected, std::flat_map, and more. Your solutions can use any C++23 feature.
Challenge 01 is now free! Try the Order Book challenge in C++ or Rust — no subscription required. Set up your repo, submit your solution, and see how you rank. Start now
| Rank | Name | Best Score |
|---|---|---|
| Abdulkadir Poyraz | 6 cycles/op | |
| Hang | 8 cycles/op | |
| Ratul D. | 10 cycles/op | |
| 4 | Emmanuel M. | 11 cycles/op |
| 5 | alain t. | 12 cycles/op |
| 6 | Roman Sztergbaum | 15 cycles/op |
| 7 | Mark R. | 18 cycles/op |
| 8 | Evgeniy A. | 86 cycles/op |
| 9 | Malacarne | 190 cycles/op |
| 10 | Mark R. | 242 cycles/op |
| 11 | Baseline (reference solution) | 437 cycles/op |