Stock Profit Stock Profit

You are a broker with a single chance to buy stock and sell stock. Having an array of prices, pick the best time to buy stock and sell stock to maximize the profit.

“short-selling” (sell first, buy later) is not allowed in this market.

Your profit is zero when it is impossible to get profit at all. The size of pricing can't be less than 2.

Input: Array of int. Stock prices.

Output: Int. Maximum possible profit.


assert stock_profit([2, 3, 4, 5]) == 3
assert stock_profit([3, 1, 3, 4, 5, 1]) == 4
assert stock_profit([4, 3, 2, 1]) == 0
assert stock_profit([6, 2, 1, 2, 3, 2, 3, 4, 5, 4]) == 4

Precondition: 0 <= price <= 1000

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