Add solution #984

Author: JoshCrozier

README.md

@@ -1,4 +1,4 @@
-# 1,066 LeetCode solutions in JavaScript
+# 1,067 LeetCode solutions in JavaScript
 
 [https://leetcode.com/](https://leetcode.com/)
 
@@ -792,6 +792,7 @@
 981|[Time Based Key-Value Store](./solutions/0981-time-based-key-value-store.js)|Medium|
 982|[Triples with Bitwise AND Equal To Zero](./solutions/0982-triples-with-bitwise-and-equal-to-zero.js)|Hard|
 983|[Minimum Cost For Tickets](./solutions/0983-minimum-cost-for-tickets.js)|Medium|
+984|[String Without AAA or BBB](./solutions/0984-string-without-aaa-or-bbb.js)|Medium|
 985|[Sum of Even Numbers After Queries](./solutions/0985-sum-of-even-numbers-after-queries.js)|Easy|
 989|[Add to Array-Form of Integer](./solutions/0989-add-to-array-form-of-integer.js)|Easy|
 994|[Rotting Oranges](./solutions/0994-rotting-oranges.js)|Medium|

solutions/0984-string-without-aaa-or-bbb.js

@@ -0,0 +1,37 @@
+/**
+ * 984. String Without AAA or BBB
+ * https://leetcode.com/problems/string-without-aaa-or-bbb/
+ * Difficulty: Medium
+ *
+ * Given two integers a and b, return any string s such that:
+ * - s has length a + b and contains exactly a 'a' letters, and exactly b 'b' letters,
+ * - The substring 'aaa' does not occur in s, and
+ * - The substring 'bbb' does not occur in s.
+ */
+
+/**
+ * @param {number} a
+ * @param {number} b
+ * @return {string}
+ */
+var strWithout3a3b = function(a, b) {
+  let result = '';
+
+  while (a > 0 || b > 0) {
+    if (a > b && a > 0 && !result.endsWith('aa')) {
+      result += 'a';
+      a--;
+    } else if (b > 0 && !result.endsWith('bb')) {
+      result += 'b';
+      b--;
+    } else if (a > 0) {
+      result += 'a';
+      a--;
+    } else {
+      result += 'b';
+      b--;
+    }
+  }
+
+  return result;
+};