摘要:
原文:Assume you have a method isSubstring which checks if one word is a substring of another. Given two strings, s1 and s2, write code to check if s2 is a rotation of s1 using only one call to isSubstring ( i.e., “waterbottle” is a rotation of “erbottlewat”).译文:假设你有一个isSubstring函数,可以检测一个字符串是否是另一个字符串的子 阅读全文