Status codes

This page lists all the status codes (verdicts) you may get when submitting on LCOJ.

Note: A single test case can have multiple errors, but only the one with the highest priority is displayed. The status codes below are listed in increasing order of priority.

AC - Accepted

Your program is correct! Sometimes the judge includes additional feedback.

WA - Wrong Answer

Your program ran without errors, but its output is incorrect. Details about the error may be included.

IR - Invalid Return

Your program exited with an error (a non-zero exit code), meaning it crashed:

• Python: usually includes the exception name, such as NameError or IndexError
• Java: usually includes the exception name, such as java.lang.NullPointerException

RTE - Runtime Error

Your program encountered an error during execution. This usually happens with C/C++.

Common RTE errors:

Message	Cause
segmentation fault, bus error	Invalid memory access. Usually caused by out-of-bounds array access, dereferencing a NULL pointer, or running out of memory
floating point exception	Invalid arithmetic operation, for example division by zero
killed	The program was terminated by the system (cause unknown)
{} syscall disallowed	The program attempted a system call that is not allowed. If you get this error without doing anything unusual, please report a bug
std::bad_alloc	Memory could not be allocated (C++)
failed initializing	Too much memory used for global variables. For example, int arr[10000][10000] takes 381MB, exceeding the 64MB limit

Common error examples:

// Segmentation fault - Array index out of bounds
int a[100];
a[1000] = 5;  // Error!

// Floating point exception - Division by zero
int x = 10 / 0;  // Error!

// Failed initializing - Array too large
int arr[100000][100000];  // Error if the memory limit is small!

OLE - Output Limit Exceeded

Your program printed too much output (usually > 256MB). Some problems may have a different limit.

Common causes:

• An infinite printing loop
• Printing too much debug output

MLE - Memory Limit Exceeded

Your program used too much memory. This is sometimes reported as an RTE with segmentation fault or std::bad_alloc.

How to fix:

• Reduce array sizes
• Optimize the algorithm to use less memory
• Free memory that is no longer needed

TLE - Time Limit Exceeded

Your program ran too long and exceeded the time limit.

How to fix:

• Optimize the algorithm (reduce its complexity)
• Remove unnecessary loops
• Use more efficient data structures

IE - Internal Error

An error on the judge's side, or an incorrectly configured problem. If you get this error, please notify an admin.