new task solved

Author: Samofalov Aleksandr

InterviewAlgorithms/SellStock.py

@@ -0,0 +1,23 @@
+#
+# Example 1:
+#
+# Input: prices = [7,1,5,3,6,4]
+# Output: 5
+# Explanation: Buy on day 2 (price = 1) and sell on day 5 (price = 6), profit = 6-1 = 5.
+# Note that buying on day 2 and selling on day 1 is not allowed because you must buy before you sell.
+
+from typing import List
+
+def best_sell(prices: List[float]) -> float:
+    """ Return the maxi profit which you can take from this transcation otherwise 0"""
+    min_price = float('inf')
+    profit = 0
+    for price in prices:
+        if price < min_price:
+            min_price = price
+        profit = max(profit, price - min_price)
+    return profit
+
+if __name__ == '__main__':
+    prices = [7, 1, 5, 3, 6, 4]
+    print(best_sell(prices))