Checking Problem Grading Results

When you submit a problem, the grading results for each test case are displayed in the Submissions tab and the Submission Details screen. If your answer is incorrect, information to help you identify the cause is listed from top to bottom.

How to Read Grading Results

1. In the list of test cases, the verdict (AC, WA, RE, etc.) is displayed at the left edge of each row. Hovering over a verdict shows its meaning.
2. When grading finishes, the first test case that was answered incorrectly opens automatically. If all test cases are correct, the first test case opens.
3. The opened test case shows a table with the verdict, execution time, memory usage, and exit status, along with the Feedback specific to the problem.
4. Below the feedback, information to help you identify the cause of the incorrect answer is displayed. The order changes depending on the verdict.
   • If the output differs from the expected output (e.g., WA), the Image Comparison or output Diff is shown first.
   • If the program terminated abnormally (e.g., RE, TLE), the Standard Error Output is shown first.

Comparing Images

For problems that output images, the expected image and your image are displayed in the Image Comparison. You can switch between three display methods.

• Side by Side: Displays the two images side by side. Clicking an image shows an enlarged view.
• Overlay: Overlays the two images and switches between them with a slider. This makes it easier to find differences in position or size.
• Diff: Highlights the differing pixels. This cannot be displayed if the two images have different sizes.

Comparing Output

For problems with expected output, the Diff displays your output and the expected output side by side, with differences color-coded. If the output is long, it is displayed when you press Show Diff.

Comparing Files

For problems that output files, your file and the expected file are displayed side by side in the File Comparison, with differences color-coded. If the file is long, it is displayed when you press Show Diff. If it is too long, only the beginning is shown. If you did not create a file, a message saying so 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.

Reading Long Output

If the standard input, standard output, or standard error output is long, part of it is displayed along with a Show All button. Pressing it displays the entire content, and Collapse returns it to the original state.

When You Don't Understand an Error

If Explain Standard Error Output with AI is displayed below the Standard Error Output, pressing it will have the AI explain the meaning of the error message.

When Information Is Not Displayed

• For private test cases, Details of this test case are private is displayed, and the input and output cannot be viewed.
• For problems where the display of grading results is disabled, the verdict itself may not be displayed.