diff --git a/counting-bits/limlimjo.js b/counting-bits/limlimjo.js
new file mode 100644
index 000000000..c30af0991
--- /dev/null
+++ b/counting-bits/limlimjo.js
@@ -0,0 +1,15 @@
+// 시간복잡도: O(n log n)
+// 공간복잡도: O(n)
+
+/**
+ * @param {number} n
+ * @return {number[]}
+ */
+var countBits = function(n) {
+    let result = [];
+    for (let i=0; i<=n; i++) {
+        result.push(i.toString(2).replace(/0/g, '').length);
+    }
+
+    return result;
+};