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Commit 3f095f2

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created solution for problem65

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	`1`	`+class Solution:`
	`2`	`+ def maxProfit(self, prices: List[int], fee: int) -> int:`
	`3`	`+ days = len(prices)`
	`4`	`+ has_buy_cache = [False] * days`
	`5`	`+ buy_cache = [None] * days`
	`6`	`+`
	`7`	`+ def buy(day):`
	`8`	`+ if day == days: return 0`
	`9`	`+ if has_buy_cache[day]: return buy_cache[day]`
	`10`	`+`
	`11`	`+ # Buy stock this day & sell another day`
	`12`	`+ profit = sell(day+1) - prices[day]`
	`13`	`+`
	`14`	`+ # Buy stock another day`
	`15`	`+ profit = max(profit, buy(day+1))`
	`16`	`+`
	`17`	`+ buy_cache[day] = profit`
	`18`	`+ has_buy_cache[day] = True`
	`19`	`+ return profit`
	`20`	`+`
	`21`	`+ has_sell_cache = [False] * days`
	`22`	`+ sell_cache = [None] * days`
	`23`	`+`
	`24`	`+ def sell(day):`
	`25`	`+ if day == days: return 0`
	`26`	`+ if has_sell_cache[day]: return sell_cache[day]`
	`27`	`+`
	`28`	`+ # Sell stock this day & buy another day`
	`29`	`+ profit = prices[day] + buy(day+1) - fee`
	`30`	`+`
	`31`	`+ # Sell stock another day`
	`32`	`+ profit = max(profit, sell(day+1))`
	`33`	`+`
	`34`	`+ sell_cache[day] = profit`
	`35`	`+ has_sell_cache[day] = True`
	`36`	`+ return profit`
	`37`	`+`
	`38`	`+ return buy(0)`

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