add: reverseBits solution

Author: Cyjin-jani

reverse-bits/Cyjin-jani.js

@@ -0,0 +1,7 @@
+// tc: O(1) -> 32비트로 고정되어있어 1로 봄..
+// sc: O(1)
+const reverseBits = function (n) {
+  const binaryStr = n.toString(2).padStart(32, '0');
+  const answer = binaryStr.split('').reverse().join('');
+  return parseInt(answer, 2);
+};