diff --git a/Solutions/S28.cpp b/Solutions/S28.cpp
new file mode 100644
index 0000000..685a15a
--- /dev/null
+++ b/Solutions/S28.cpp
@@ -0,0 +1,8 @@
+vector<int> countBits(int num) {
+    vector<int> res;
+    for(int i = 0; i <= num; i++)
+    {
+        res.push_back(__builtin_popcount(i));
+    }
+    return res;
+}
\ No newline at end of file