How does python judge the best time to buy and sell stocks

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Topic: the best time to buy and sell stocks

Given an array, its first element is the price of a given stock on day I.

Design an algorithm to calculate the maximum profit you can make. You can complete as many trades as you can (buy and sell a stock multiple times).

Note: you cannot participate in multiple trades at the same time (you must sell the previous stock before buying again).

Example 1:

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

Output: 7

Explanation: if you buy on day 2 (stock price = 1) and sell on day 3 (stock price = 5), the exchange will earn a profit of 5-1 = 4.

Then, buy on day 4 (stock price = 3) and sell on day 5 (stock price = 6). The exchange earns a profit of 6-3 = 3.

Example 2:

Input: [1, 2, 3, 4, 5]

Output: 4

Tip:

one