diff --git a/README.md b/README.md
index 44e0723..1d3c3e4 100644
--- a/README.md
+++ b/README.md
@@ -91,3 +91,4 @@ scripts/
 ```
 
 Each round's `data/` directory is generated locally and gitignored.
+This is mlv's PR
diff --git a/rounds/1_histogram/solution.py b/rounds/1_histogram/solution.py
index dffbee5..71b99e6 100644
--- a/rounds/1_histogram/solution.py
+++ b/rounds/1_histogram/solution.py
@@ -9,6 +9,21 @@
 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
+    with open(path, "rb") as f:
+        data = f.read()
 
-    return _baseline(path)
+    counts = []
+    for ii in range(256):
+        counts.append([])
+        for jj in range(256):
+            counts[ii].append(0)
+            
+    for ii in range(len(data) - 1):
+        counts[data[ii]][data[ii+1]] += 1
+
+    d = {}
+    for rr in range(256):
+        for cc in range(256):
+            if counts[rr][cc] > 0:
+                d[bytes((rr,cc))] = counts[rr][cc]
+    return d