USACO OPEN 2010

真是悲剧阿。。第一题我想到了dP但因为我以为回来前只能跳一次导致噢只对了3个。。第二题我DP写对了。。但是没用long long。。WA一个点。。第3题悲剧了。。骗分都没写。。OrzWinmad神牛AC!!

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