Add solution #1352

Author: JoshCrozier

README.md

@@ -430,6 +430,7 @@
 1333|[Filter Restaurants by Vegan-Friendly, Price and Distance](./1333-filter-restaurants-by-vegan-friendly-price-and-distance.js)|Medium|
 1342|[Number of Steps to Reduce a Number to Zero](./1342-number-of-steps-to-reduce-a-number-to-zero.js)|Easy|
 1351|[Count Negative Numbers in a Sorted Matrix](./1351-count-negative-numbers-in-a-sorted-matrix.js)|Easy|
+1352|[Product of the Last K Numbers](./1352-product-of-the-last-k-numbers.js)|Medium|
 1356|[Sort Integers by The Number of 1 Bits](./1356-sort-integers-by-the-number-of-1-bits.js)|Easy|
 1360|[Number of Days Between Two Dates](./1360-number-of-days-between-two-dates.js)|Easy|
 1365|[How Many Numbers Are Smaller Than the Current Number](./1365-how-many-numbers-are-smaller-than-the-current-number.js)|Easy|

solutions/1352-product-of-the-last-k-numbers.js

@@ -0,0 +1,36 @@
+/**
+ * 1352. Product of the Last K Numbers
+ * https://leetcode.com/problems/product-of-the-last-k-numbers/
+ * Difficulty: Medium
+ *
+ * Design an algorithm that accepts a stream of integers and retrieves the product of the
+ * last k integers of the stream.
+ *
+ * Implement the ProductOfNumbers class:
+ * - ProductOfNumbers() Initializes the object with an empty stream.
+ * - void add(int num) Appends the integer num to the stream.
+ * - int getProduct(int k) Returns the product of the last k numbers in the current list.
+ *   You can assume that always the current list has at least k numbers.
+ * - The test cases are generated so that, at any time, the product of any contiguous sequence
+ *   of numbers will fit into a single 32-bit integer without overflowing.
+ */
+
+var ProductOfNumbers = function() {
+  this.nums = [];
+};
+
+/**
+ * @param {number} num
+ * @return {void}
+ */
+ProductOfNumbers.prototype.add = function(num) {
+  this.nums.push(num);
+};
+
+/**
+ * @param {number} k
+ * @return {number}
+ */
+ProductOfNumbers.prototype.getProduct = function(k) {
+  return this.nums.slice(-k).reduce((product, n) => product * n, 1);
+};