NAIPC2018 参考:http://www.cnblogs.com/LQLlulu/p/9513669.html?tdsourcetag=s_pctim_aiomsg https://www.cnblogs.com/clrs97/p/8730429.html?tdsourcetag=s_pctim_aiomsg E-Prefix Free Code 题目描述 Consider n initial strings of lower case letters, where no initial s…