You are given an array prices where prices[i] is the price of a given stock on the ith day.   You want to maximize your profit by choosing a single day to buy one stock and choosing a different day in the future to sell that stock.   Return the maximum profit you can achieve from this transaction. If you cannot achieve any profit, return 0.       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. Example 2:   Input: prices = [7,6,4,3,1] Output: 0 Explanation: In this case, no transactions are done and the max profit = 0.   Please solve it in Java

Question

You are given an array prices where prices[i] is the price of a given stock on the ith day.

 

You want to maximize your profit by choosing a single day to buy one stock and choosing a different day in the future to sell that stock.

 

Return the maximum profit you can achieve from this transaction. If you cannot achieve any profit, return 0.

 

 

 

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.

Example 2:

 

Input: prices = [7,6,4,3,1]

Output: 0

Explanation: In this case, no transactions are done and the max profit = 0.

 

Please solve it in Java

 

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