diff --git a/7.py b/7.py
index e69de29..2b4d71f 100644
--- a/7.py
+++ b/7.py
@@ -0,0 +1,31 @@
+import numpy as np
+
+
+def part_one(crabs: np.ndarray):
+
+    smallest_diff = np.inf
+
+    for i in range(1, crabs.max()):
+        cost = abs(crabs - i).sum()
+        smallest_diff = min(smallest_diff, cost)
+
+    return smallest_diff
+
+
+def part_two(crabs):
+    smallest_diff = np.inf
+
+    for i in range(1, crabs.max()):
+        diffs = abs(crabs - i) + 1
+
+        cost = sum([np.arange(diff, dtype=np.int64).sum() for diff in diffs])
+
+        smallest_diff = min(smallest_diff, cost)
+
+    return smallest_diff
+
+
+if __name__ == "__main__":
+    crabs = np.array([int(x) for x in input().split(",")])
+    print("Part One:", part_one(crabs))
+    print("Part Two:", part_two(crabs))