feat: best time to buy and sell

Author: maddhruv

README.md

@@ -4,6 +4,7 @@ Solutions of LeetCode Blind 75 Problems in JavaScript
 
 :goal_net: [Curated List of Top 75 LeetCode Questions](https://www.teamblind.com/post/New-Year-Gift---Curated-List-of-Top-75-LeetCode-Questions-to-Save-Your-Time-OaM1orEU)
 
-| Problem                 | Difficulty                                             | Tags                  | LeetCode                                         |
-| ----------------------- | ------------------------------------------------------ | --------------------- | ------------------------------------------------ |
-| [Two Sum](./two-sum.js) | <img src="https://img.shields.io/badge/-Easy-green" /> | `Array`, `Hash Table` | [:link:](https://leetcode.com/problems/two-sum/) |
+| Problem                                                                 | Difficulty                                             | Tags                           | LeetCode                                                                 |
+| ----------------------------------------------------------------------- | ------------------------------------------------------ | ------------------------------ | ------------------------------------------------------------------------ |
+| [Two Sum](./two-sum.js)                                                 | <img src="https://img.shields.io/badge/-Easy-green" /> | `Array`, `Hash Table`          | [:link:](https://leetcode.com/problems/two-sum/)                         |
+| [Best Time to Buy and Sell Stock](./best-time-to-buy-and-sell-stock.js) | <img src="https://img.shields.io/badge/-Easy-green" /> | `Array`, `Dynamic Programming` | [:link:](https://leetcode.com/problems/best-time-to-buy-and-sell-stock/) |

best-time-to-buy-and-sell-stock.js

@@ -0,0 +1,18 @@
+const maxProfit = (prices) => {
+  let buy = 0,
+    sell = 1,
+    max = (profit = 0);
+
+  while (sell < prices.length) {
+    if (prices[buy] < prices[sell]) {
+      profit = prices[sell] - prices[buy];
+      max = Math.max(max, profit);
+    } else {
+      buy = sell;
+    }
+
+    sell++;
+  }
+
+  return max;
+};