摘要:
link Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n). For example,S = "ADO 阅读全文
摘要:
link Given two words word1 and word2, find the minimum number of steps required to convert word1 to word2. (each operation is counted as 1 step.) You 阅读全文