0030.substring-with-concatenation-of-all-words

30. Substring with Concatenation of All Words

题目

You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) in s that is a concatenation of each word in words exactly once and without any intervening characters.

For example, given:
s: "barfoothefoobarman"
words: ["foo", "bar"]

You should return the indices: [0,9]. (order does not matter).

解题思路

words中会包含重复的word

详见程序注释。

总结