diff --git a/Week03/pyramid_aysegul_yildiz.py b/Week03/pyramid_aysegul_yildiz.py
new file mode 100644
index 00000000..0564077c
--- /dev/null
+++ b/Week03/pyramid_aysegul_yildiz.py
@@ -0,0 +1,11 @@
+import math
+
+def calculate_pyramid_height(n: int) -> int:
+    if n <= 0:
+        return 0
+
+    # h(h+1)/2 <= n → h ≤ (sqrt(1 + 8*n) - 1) / 2
+    
+    h = (math.isqrt(1 + 8*n) - 1) // 2
+    return int(h)
+