There is a new alien language which uses the latin alphabet. However, the order among letters are unknown to you. You receive a list of non-empty words from the dictionary, where words are sorted lexicographically by the rules of this new language. Derive the order of letters in this language.
Example 1:
Input: [ "wrt", "wrf", "er", "ett", "rftt" ] Output: "wertf"
题目
给定一组单词，已知这些单词的排列顺序是符合某种奇怪的字典序的。请求出这种字典序下各个字母的排列顺序，对于存在多种答案者，给出任一即可。
思路
代码
转载于:https://www.cnblogs.com/liuliu5151/p/9816915.html
相关资源：数据结构—成绩单生成器