OK | Correct answer | The task is passed — congratulations! |
WA | Wrong answer | The answer is incorrect. Check your logic and the output format against the task statement. |
PE | Presentation error | The number of lines in the output does not match what was expected. Fix the answer format. |
RE | Runtime error | The program crashed and did not produce an answer. Check for exceptions and crashes. |
ML | Memory limit | The memory limit (128 MB) was exceeded. Optimize your RAM usage. |
TL | Time limit | The execution time limit (2 s) was exceeded. Speed up your algorithm. |
IL | Idleness limit | The idle time limit was exceeded — the program "hung" or is waiting for input that isn’t there. |
SV | Security violation | The program performed unsafe operations. Remove system calls. |
CR | Crash / non-zero exit code | The program returned a non-zero value. Check your return code and program termination. |
SE | Server error | An error in the checking system — not your fault. Report it to an organizer. |