diff --git a/README.md b/README.md
index 44e0723..11a7d43 100644
--- a/README.md
+++ b/README.md
@@ -91,3 +91,4 @@ scripts/
 ```
 
 Each round's `data/` directory is generated locally and gitignored.
+This is Stefanie's PR
diff --git a/rounds/1_histogram/solution.py b/rounds/1_histogram/solution.py
index dffbee5..987c315 100644
--- a/rounds/1_histogram/solution.py
+++ b/rounds/1_histogram/solution.py
@@ -5,10 +5,11 @@
 own faster implementation.
 """
 
+from collections import Counter
+from itertools import pairwise
+from pathlib import Path
+
 
 def compute_histogram(path: str) -> dict[bytes, int]:
     """Frequency of every 2-byte bigram in the file at ``path``."""
-    # TODO: remove this delegation and write your own implementation here.
-    from .baseline import compute_histogram as _baseline
-
-    return _baseline(path)
+    return Counter(bytes(bigram) for bigram in pairwise(Path(path).read_bytes()))