Check the Grading Results of a Problem

When you submit a solution, the grading result for each test case is shown in the Submissions tab and on the submission detail screen. If your answer is incorrect, the information needed to find the cause is listed from top to bottom.

How to Read the Grading Results

1. In the test case list, the verdict (AC, WA, RE, etc.) is shown at the left edge of each row. Hover over a verdict to see its meaning.
2. When grading is complete, the first test case that failed is opened automatically. If all test cases passed, the first test case is opened.
3. The opened test case shows a table of the verdict, execution time, memory usage, and exit status, along with the Feedback for the problem.
4. Below the feedback, information for finding the cause of an incorrect answer is displayed. The order depends on the verdict.
   • When the output differs from the expected output (such as WA), Image comparison or the output Diff is shown first.
   • When the program terminates abnormally (such as RE or TLE), Standard error output is shown first.

Compare Images

For problems that output images, the expected image and your image are shown in Image comparison. You can switch between three display modes.

• Side by side: Shows the two images next to each other. Click an image to view it enlarged.
• Overlay: Overlaps the two images and lets you switch between them with a slider. This makes it easier to spot differences in position and size.
• Diff: Highlights the pixels that differ. If the two images have different sizes, this cannot be displayed.

Compare Output

For problems that have an expected output, Diff shows your output and the expected output side by side, with differing parts color-coded. If the output is long, it is displayed when you press Show diff.

Compare Files

For problems that output files, your file and the expected file are shown side by side in File comparison, with differing parts color-coded. If a file is long, it is displayed when you press Show diff. If the file is too long, only the beginning is shown. If you did not create a file, a message to that effect is displayed. Text output files that are not comparison targets are shown in Output files, and images are shown in Output images. Other binary files are shown by name only.

Read Long Output

If standard input, standard output, or standard error output is long, only the beginning is shown along with a Show all button. Press it to display the entire content, and press Collapse to return to the shortened view.

When You Do Not Understand an Error

If the Explain standard error output with AI option appears below Standard error output, pressing it causes the AI to explain the meaning of the error message.

When Some Information Is Not Shown

• For private test cases, The details of this test case are private is displayed, and the input and output cannot be viewed.
• For problems where displaying grading results has been disabled, the verdict itself may not be shown.