Pergunta de entrevista da empresa Amazon
1. build a queue using 2 stacks 2. find the first repeated number/string in an array 3. 2-sum 4. given an array of strings, find all the anagrams
1. build a queue using 2 stacks 2. find the first repeated number/string in an array 3. 2-sum 4. given an array of strings, find all the anagrams