fylfyl2的专栏

https://leetcode.com/problems/letter-combinations-of-a-phone-number/这是我一开始的思路，穷举而已。String[] myMap=new String[]{"abc","def","ghi","jkl","mno","pqrs","tuv","wxyz"}; public List letterCombination

原题链接https://leetcode.com/problems/repeated-dna-sequences/由于只有ATGC四个字母。我就简单的想到了位图对应的办法来做：public class Solution { public List findRepeatedDnaSequences(String s) { Set result=new HashSet();