标签:family mil main else image 元素 while 最大 tin
想到:prices中一列数字,任取一个为买入价格buy,在其右边任取一个为卖出价格sell;
取[buy,...,sell]区间中相邻数字之差,这些差值求和为sum,则必有sell-buy = sum;
本题中求最大收益,所以遍历prices,找到prices[i]-prices[i-1] > 0的位置作为买入点。
此后一直遍历到prices末尾,将相邻两个元素的差加到ans中,最后得ans即为最大利润。
代码一:
1 class Solution(object): 2 def maxProfit(self, prices): 3 """ 4 :type prices: List[int] 5 :rtype: int 6 """ 7 i = 0 8 ans = 0 9 while i < len(prices) - 1: 10 if prices[i + 1] < prices[i]: 11 i += 1 12 continue 13 else: 14 buy = prices[i] 15 ans += prices[i + 1] - buy 16 i += 1 17 return ans 18 19 if __name__ == ‘__main__‘: 20 solution = Solution() 21 print(solution.maxProfit2([7, 1, 5, 3, 4, 6]))
1 class Solution(object): 2 def maxProfit(self, prices): 3 """ 4 :type prices: List[int] 5 :rtype: int 6 """ 7 ans = 0 8 for i in range(1, len(prices)): 9 if prices[i] > prices[i - 1]: 10 ans += prices[i] - prices[i - 1] 11 return ans 12 13 if __name__ == ‘__main__‘: 14 solution = Solution() 15 print(solution.maxProfit([7, 1, 5, 3, 4, 6]))
标签:family mil main else image 元素 while 最大 tin
原文地址:https://www.cnblogs.com/panweiwei/p/12748768.html