diff --git a/Week03/pyramid_beytullah_arslan.py b/Week03/pyramid_beytullah_arslan.py
new file mode 100644
index 00000000..4d0215a9
--- /dev/null
+++ b/Week03/pyramid_beytullah_arslan.py
@@ -0,0 +1,15 @@
+def calculate_pyramid_height(number_of_blocks):
+    if number_of_blocks <= 0:
+        return 0
+    height = int((-1 + (1 + 8 * number_of_blocks) ** 0.5) / 2) 
+    return height #O(1)
+
+# def calculate_pyramid_height(number_of_blocks): 
+#     number_of_blocks = 1
+#     while True:
+#         if blocks < height:
+#             height = height-1
+#             break
+#         blocks = blocks - height
+#         height += 1
+#     return height O(n)