Add solution #201

Author: JoshCrozier

README.md

@@ -174,6 +174,7 @@
 198|[House Robber](./0198-house-robber.js)|Medium|
 199|[Binary Tree Right Side View](./0199-binary-tree-right-side-view.js)|Medium|
 200|[Number of Islands](./0200-number-of-islands.js)|Medium|
+201|[Bitwise AND of Numbers Range](./0201-bitwise-and-of-numbers-range.js)|Medium|
 202|[Happy Number](./0202-happy-number.js)|Easy|
 203|[Remove Linked List Elements](./0203-remove-linked-list-elements.js)|Easy|
 204|[Count Primes](./0204-count-primes.js)|Medium|

solutions/0201-bitwise-and-of-numbers-range.js

@@ -0,0 +1,23 @@
+/**
+ * 201. Bitwise AND of Numbers Range
+ * https://leetcode.com/problems/bitwise-and-of-numbers-range/
+ * Difficulty: Medium
+ *
+ * Given two integers left and right that represent the range [left, right], return the
+ * bitwise AND of all numbers in this range, inclusive.
+ */
+
+/**
+ * @param {number} left
+ * @param {number} right
+ * @return {number}
+ */
+var rangeBitwiseAnd = function(left, right) {
+  let count = 0;
+  while (left !== right) {
+    left >>= 1;
+    right >>= 1;
+    count++;
+  }
+  return left << count;
+};