Substring with Concatenation of All Words 找到连接所有单词的子串(加解决找出xx子串的通用模板)
Youaregivenastring,s,andalistofwords,words,thatareallofthesamelength.Findallstartingindicesofsubstring(s)insthatisaconcatenationofeachwordinwordsexactlyonceandwithoutanyinterveningcharacters.Forexampl