Solve problems mentioned in http://algoogle.hadrori.jp/algorithm/aho-corasick.html. - [x] https://atcoder.jp/contests/joisc2010/tasks/joisc2010_dna - [ ] https://codeforces.com/problemset/problem/434/C - [ ] http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=2212
