읽어보도록 하자.논문 : https://pdfs.semanticscholar.org/3547/ac839d02f6efe3f6f76a8289738a22528442.pdf문제 풀이 : https://www.acmicpc.net/problem/9250참고 : 슬라이드쉐어 ( https://www.slideshare.net/ssuser81b91b/ahocorasick-algorithm )