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Best Time to Buy and Sell Stock III(参见这篇文章)的简化版
迭代法求最大利润。当然是在峰值卖出,在低谷买进利润最大了。所以从后向前遍历所有价格,如果当前价格比之前的峰值价格还高,更新峰值价格,否则就用峰值价格减去当前价格看看利润多少。
代码:
1 int maxProfit(vector<int> &prices) { 2 int profit = 0; 3 int climax = -1; 4 5 for (int i = prices.size() - 1; i >= 0; i--) { 6 if (prices[i] >= climax) 7 climax = prices[i]; 8 else 9 profit = max(profit, climax - prices[i]); 10 } 11 12 return profit; 13 }
Leetcode#121 Best Time to Buy and Sell Stock
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原文地址:http://www.cnblogs.com/boring09/p/4262460.html