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Easy

Array

Best Time to Buy and Sell Stock

Examples

Input: prices = [7,1,5,3,6,4]

Output: 5

Buy day 1 (1), sell day 4 (6).

Sample Test Cases

Case 1 Input: [7,1,5,3,6,4]

Expected: 5

Case 2 Input: [7,6,4,3,1]

Expected: 0

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Case 1 Input: [7,1,5,3,6,4]

Expected: 5

Case 2 Input: [7,6,4,3,1]

Expected: 0

Given prices where prices[i] is the price on day i, return the maximum profit from one buy and one sell. You must buy before you sell.