diff --git "a/leetcode3/\355\231\251\354\235\200\354\247\200/476. Number Complement.js" "b/leetcode3/\355\231\251\354\235\200\354\247\200/476. Number Complement.js"
new file mode 100644
index 00000000..cdf7eb3e
--- /dev/null
+++ "b/leetcode3/\355\231\251\354\235\200\354\247\200/476. Number Complement.js"	
@@ -0,0 +1,14 @@
+/**
+ * @param {number} num
+ * @return {number}
+ */
+var findComplement = function (num) {
+  const binary = num.toString(2);
+  return parseInt(
+    binary
+      .split("")
+      .map((digit) => (digit === "1" ? "0" : "1"))
+      .join(""),
+    2,
+  );
+};