1. Reverse Bits

reverse-bits/sunjae95.js

@@ -0,0 +1,18 @@
+/**
+ * @description
+ *
+ * n = length of n
+ * time complexity: O(n)
+ * space complexity: O(n)
+ */
+var reverseBits = function (n) {
+  let answer = 0;
+  let binary = n.toString(2);
+
+  if (binary.length < 32) binary = "0".repeat(32 - binary.length) + binary;
+
+  for (let i = binary.length - 1; i >= 0; i--)
+    answer += Math.pow(2, i) * Number(binary[i]);
+
+  return answer;
+};