add test data

README.md

@@ -1,3 +1,35 @@
 ---
 license: apache-2.0
+language:
+- python
+- cpp
+- go
+- java
+- rust
+- javascript
+- typescript
+- php
+- ruby
+task_categories:
+- text-generation
 ---
+
+# LeetCode multilingual benchmark dataset
+
+Post-interface problem rows for the msl-multilingual-self-learning benchmark. Each
+JSON line is one LeetCode problem with the 9-language callable `interfaces`,
+`canonical_tests` (a Python check(candidate) oracle), `problem_description`, and
+`metadata`.
+
+## Splits
+
+- `train`: 2878 problems (all-9-language universe minus the newfacade test split).
+- `test`: 201 problems (held-out eval).
+
+## Load
+
+```python
+from datasets import load_dataset
+train = load_dataset("neulab/leetcode", split="train")
+test = load_dataset("neulab/leetcode", split="test")
+```