leetcode:121. Best Time to Buy and Sell Stock(Java)解答

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Best Time to Buy and Sell Stock My Submissions Question

Say you have an array for which the ith element is the price of a given stock on day i.

If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an algorithm to find the maximum profit.

解法(java):数组中第i个数字减去前面i-1个数字中的最小数字即为从前i个股票价格变化中可得到的最大收益。

public int maxProfit(int[] prices) 
        int maxPro = 0;
        int minPrice = Integer.MAX_VALUE;
        for (int price : prices) 
            maxPro = Math.max(maxPro, price - minPrice);
            minPrice = Math.min(minPrice, price);
        
        return maxPro;
    

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