diff --git a/04-stl-basics/tasks/03-createSortedList.cpp b/04-stl-basics/tasks/03-createSortedList.cpp
index ee518893..52030ed9 100644
--- a/04-stl-basics/tasks/03-createSortedList.cpp
+++ b/04-stl-basics/tasks/03-createSortedList.cpp
@@ -1,15 +1,33 @@
 #include <iostream>
 #include <vector>
+using namespace std;
 
-// Implement createSortedList
-// add proper include :)
+vector<int> concatenateVector(vector<int> vec1, vector<int> vec2)
+{
+    int i=0;
+    vector<int> resultVector;
+  for (auto element : vec1)
+  {
+      resultVector.push_back(element);
+      resultVector.push_back(vec2[i]);
+      i++;
 
-int main() {
-    std::vector<int> vec{2, 3, 4, 1, 6, 5, 8, 7, 9, 0};
-    auto list = createSortedList(vec);
+  }
+  return resultVector;
 
-    for (const auto& el : list)
-        std::cout << el << " ";
+}
+
+
+
+int main()
+{
+    vector<int> vec1 {1,2,3,4,5};
+    vector<int> vec2 {11,12,13,14,15};
+    auto vec=concatenateVector(vec1, vec2);
+    for (const auto& el:vec)
+    {
+        cout<<el<<"";
 
+    }
     return 0;
 }