StockPrice

StockPrice.swift

/*
 Given a array of numbers representing the stock prices of a company in chronological order, write a function that calculates the maximum profit you could have made from buying and selling that stock once. You must buy before you can sell it.
 For example, given [9, 11, 8, 5, 7, 10], you should return 5, since you could buy the stock at 5 dollars and sell it at 10 dollars.
 */

func stockPrice(stocks: [Int]) -> Int {
    var max = 0
    for(i, buy) in stocks.enumerated() {
        for sell in i+1..<stocks.count {
            let profit = stocks[sell] - buy
            if profit > max { max = profit }
        }
    }
    return max
}