diff --git a/Week03/pyramid_recepkadir_altintas.py b/Week03/pyramid_recepkadir_altintas.py
new file mode 100644
index 00000000..ad56d765
--- /dev/null
+++ b/Week03/pyramid_recepkadir_altintas.py
@@ -0,0 +1,9 @@
+def calculate_pyramid_height(number_of_blocks : int) -> int :
+    height = 0
+    block_for_floor = 1
+    while number_of_blocks >= block_for_floor :
+        number_of_blocks -= block_for_floor
+        height += 1
+        block_for_floor += 1
+
+    return height  
diff --git a/Week03/sequences_recepkadir_altintas.py b/Week03/sequences_recepkadir_altintas.py
new file mode 100644
index 00000000..db51a22b
--- /dev/null
+++ b/Week03/sequences_recepkadir_altintas.py
@@ -0,0 +1,13 @@
+from collections import Counter
+
+def remove_duplicates(seq: list) -> list:
+   
+    return list(dict.fromkeys(seq))
+
+def list_counts(seq: list) -> dict:
+    
+    return dict(Counter(seq))
+
+def reverse_dict(d: dict) -> dict:
+   
+    return {value: key for key, value in d.items()}