[leetcode]Word Break @ Python
原題地址：https://oj.leetcode.com/problems/word-break/ 題意： Given a string s and a dictionary of words dict, determine if s can be segmented ...
原文：[leetcode]Word Break
LeetCode越來越大姨媽了，Submit上去又卡住了，先假設通過了吧。這道題拿到思考先是遞歸，然后有重復子狀態，顯然是DP。用f i,j 表示字符串S從i到j的子串是否可分割，則有：f ,n f ,i amp amp f i,n 。但是如果自底向上求的話會計算很多不需要的，比如leet已經在字典里了，很多情況下就不需要計算下面的l,e,e,t了，所以自頂向下遞歸 備忘錄會是更快的方法。 imp ...
2013-10-16 00:19 2 2957 推薦指數：
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