Update README.md

Add comments about dataset files

README.md

@@ -12,6 +12,28 @@ configs:
         path: output_dataset.parquet
 
 ---
+# Data Preview
+
+The data available in this preview contains two datasets:
+
+1. **Full Dataset ("full")**: This dataset includes data from 2011 to 2023.
+2. **Sample Dataset ("sample")**: This is a subset of the full dataset, containing data from 2023.
+
+## Fields
+
+The dataset include the following fields:
+
+- `name` (string)
+- `year` (string)
+- `round` (string)
+- `statement` (string)
+- `input` (string)
+- `solution` (string)
+- `code` (string)
+- `sample_input` (string)
+- `sample_output` (string)
+- `images` (array of base64 image strings)
+
 
 This dataset contains every Facebook/Meta Hacker Cup problem from 2011 through 2023. For each problem, you'll find these files:
 
@@ -19,6 +41,8 @@ This dataset contains every Facebook/Meta Hacker Cup problem from 2011 through 2
 * `<problem_name>.in`: The full input file
 * `<problem_name>.out`: The full output file
   * Note that some problems accept multiple possible outputs, in which case the full output file is simply an example of an output that would be accepted
+* `<problem_name>_sample_input.txt`: The sample input provided by the problem statement
+* `<problem_name>_sample_output.txt`: The sample output provided by the problem statement
  
 Note that for problems from 2011 thorugh 2019, the problems were initially typeset in html. For those problems you can find:
 
@@ -29,7 +53,7 @@ For these problems, the Markdown version of the statement (`<problem_name>.md`)
 For some problems, written solutions/analyses are available:
 
 * `<problem_name>.sol.md`
-
+** 
 For some problem, code solutions are available:
 
 * `<problem_name>.(cpp|py|java)`
@@ -40,6 +64,11 @@ Some problems contains references to images that look like this:
 
 In the same folder as the problem statement, you can find `<photo_id>.jpg` or `<photo_id>.gif`
 
+## Notes
+
+- Solutions prior to 2019 do not contain markdown solution files.
+- The 2019 markdown solutions are not included in the dataset but can be found in `.cpp` files.
+
 ## Citation
 
 If you use this dataset, please cite it as follows: