diff --git a/modules/09_cpp11/src/smart_pointers.cpp b/modules/09_cpp11/src/smart_pointers.cpp
index 072134a..7e9df6a 100644
--- a/modules/09_cpp11/src/smart_pointers.cpp
+++ b/modules/09_cpp11/src/smart_pointers.cpp
@@ -3,18 +3,19 @@
 namespace cpp11 {
 
 auto make_counter(int start) -> std::unique_ptr<int> {
-    (void)start;
-    return nullptr;
+    return std::make_unique<int>(start);
 }
 
 auto shared_total(const std::vector<std::shared_ptr<int>>& values) -> int {
-    (void)values;
-    return 0;
+    int total = 0;
+    for (const auto& value : values) {
+        total += *value;
+    }
+    return total;
 }
 
 auto clone_unique(const std::unique_ptr<int>& value) -> std::unique_ptr<int> {
-    (void)value;
-    return nullptr;
+    return std::make_unique<int>(*value);
 }
 
 }  // namespace cpp11