A. Police Recruits(水) The police department of your city has just started its journey. Initially, they don’t have any manpower. So, they started hiring new recruits in groups. Meanwhile, crimes k
244.最短单词距离II 方法:哈希表+双指针 class WordDistance {HashMap<String,List<Integer>> map = new HashMap<>();public WordDistance(String[] wordsDict) {int len = wordsDict.length;for(int i =0;i< len;i++){String