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问题描述:股票买进卖出问题(可多次买进卖出)
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代码示例：贪心算法
class Solution(object):
def maxProfit(self, prices):
"""
:type prices: List[int]
:rtype: int
"""
length = len(prices)
if length <= 0: return 0
max_value = 0
for i in range(1,length):
if prices[i] > prices[i-1]:
max_value += prices[i] - prices[i-1]
return max_value
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