diff --git a/Week02/types_yagiz_cengiz.py b/Week02/types_yagiz_cengiz.py
new file mode 100644
index 00000000..20fa11cf
--- /dev/null
+++ b/Week02/types_yagiz_cengiz.py
@@ -0,0 +1,4 @@
+my_int = 22
+my_float = 7.29
+my_bool = True
+my_complex = 5 + 1j
diff --git a/Week03/pyramid_yagiz_cengiz.py b/Week03/pyramid_yagiz_cengiz.py
new file mode 100644
index 00000000..6b7188f7
--- /dev/null
+++ b/Week03/pyramid_yagiz_cengiz.py
@@ -0,0 +1,8 @@
+def calculate_pyramid_height(number_of_blocks):
+    height = 0
+    needed_blocks = 1
+    while number_of_blocks >= needed_blocks:
+        number_of_blocks -= needed_blocks
+        height += 1
+        needed_blocks += 1
+    return height
diff --git a/Week03/sequences_yagiz_cengiz.py b/Week03/sequences_yagiz_cengiz.py
new file mode 100644
index 00000000..ae31fb73
--- /dev/null
+++ b/Week03/sequences_yagiz_cengiz.py
@@ -0,0 +1,26 @@
+def remove_duplicates(seq: list) -> list:
+    """
+    This function removes duplicates from a list.
+    """
+    result = []
+    for item in seq:
+        if item not in result:
+            result.append(item)
+    return result
+
+
+def list_counts(seq: list) -> dict:
+    """
+    This function counts the number of occurrences of each item in a list.
+    """
+    counts = {}
+    for item in seq:
+        counts[item] = counts.get(item, 0) + 1
+    return counts
+
+
+def reverse_dict(d: dict) -> dict:
+    """
+    This function reverses the keys and values of a dictionary.
+    """
+    return {value: key for key, value in d.items()}