word break相关问题的解法
https://leetcode.com/problems/word-break/?tab=Description
以及
https://leetcode.com/problems/concatenated-words/?tab=Description
都很类似。用的都是DP,可以见:
https://discuss.leetcode.com/topic/72113/java-dp-solution/2
截取到一定下标,然后看之前是否存在,然后再看后面的是否存在。
注意,这个存在所用的dict,是可以重复被使用的。如果每个字段只能用一次,那就应该用回溯,而不是DP了。
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