Sandboxed · CPU-time accurate · Live verdicts
Write it, submit it, watch it judged.
Every submission is compiled and executed inside a real sandbox with its own cgroup, its own network namespace and its own clock. Time limits are measured on CPU time, so a busy judge never turns a correct solution into a TLE.
- Problems
- 0
- Languages
- 2
- Verdicts
- 8
| Test | Verdict | Time | Memory |
|---|---|---|---|
| 1 | 12 ms | 3204 KB | |
| 2 | 15 ms | 3208 KB | |
| 3 | 31 ms | 3412 KB | |
| 4 | 118 ms | 4096 KB |
judged in 412 ms · isolate box 7 · cpp20
Measured on CPU time
A time limit counts the time your program actually spent running, not how busy the judge was. The same solution gets the same verdict at 3am and during a contest.
Nothing is lost
A submission and its dispatch record commit in one transaction, and abandoned work is reclaimed automatically. A judge crashing mid-run costs you a retry, not your answer.
Verdicts arrive live
Results stream to the page as each test finishes. Open the tab late and you still get the full history — nothing depends on you watching at the right moment.