Merge pull request #124 from dsrao711/issue_123

Python solution for Buy and sell stock in DSA 450

Author: smv1999

DSA 450 GFG/BuyandSell.py

@@ -0,0 +1,12 @@
+# Link to the problem : https://leetcode.com/problems/best-time-to-buy-and-sell-stock/
+
+class Solution:
+    def maxProfit(self, prices):
+        min_so_far = prices[0]
+        max_profit = 0
+        n = len(prices)
+        for i in prices :
+          min_so_far = min(min_so_far , i)
+          profit = i - min_so_far
+          max_profit = max(max_profit , profit)
+        return max_profit