Best Time to Buy and Sell Stock
easyYou are given an array `prices` where `prices[i]` is the price of a given stock on the `i`th 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.
Example 2
Input: prices = [7,6,4,3,1]
Output: 0
Explanation: In this case, no transactions are done and the max profit = 0.
Constraints
1 <= prices.length <= 10^50 <= prices[i] <= 10^4
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Test Cases
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