diff --git a/labs02/task08.py b/labs02/task08.py
index 252b10d..0100ab5 100644
--- a/labs02/task08.py
+++ b/labs02/task08.py
@@ -7,7 +7,12 @@ przez 3 lub 5 mniejszych niż n.
 """
 
 def sum_div35(n):
-    pass
+    suma = 0
+    for i in range(n):
+        if (i+1) < n and (i+1)%3 == 0 and (i+1)%5 == 0:
+            suma += (i+1)
+
+    return suma
 
 def tests(f):
     inputs = [[10], [100], [3845]]