Add solution #1256

Author: JoshCrozier

README.md

@@ -1165,6 +1165,7 @@
 1253|[Reconstruct a 2-Row Binary Matrix](./solutions/1253-reconstruct-a-2-row-binary-matrix.js)|Medium|
 1254|[Number of Closed Islands](./solutions/1254-number-of-closed-islands.js)|Medium|
 1255|[Maximum Score Words Formed by Letters](./solutions/1255-maximum-score-words-formed-by-letters.js)|Hard|
+1256|[Encode Number](./solutions/1256-encode-number.js)|Medium|
 1260|[Shift 2D Grid](./solutions/1260-shift-2d-grid.js)|Easy|
 1261|[Find Elements in a Contaminated Binary Tree](./solutions/1261-find-elements-in-a-contaminated-binary-tree.js)|Medium|
 1262|[Greatest Sum Divisible by Three](./solutions/1262-greatest-sum-divisible-by-three.js)|Medium|

solutions/1256-encode-number.js

@@ -0,0 +1,18 @@
+/**
+ * 1256. Encode Number
+ * https://leetcode.com/problems/encode-number/
+ * Difficulty: Medium
+ *
+ * Given a non-negative integer num, Return its encoding string.
+ *
+ * The encoding is done by converting the integer to a string using a secret function that
+ * you should deduce from the following table:
+ */
+
+/**
+ * @param {number} num
+ * @return {string}
+ */
+var encode = function(num) {
+  return (num + 1).toString(2).slice(1);
+};