摘要: A message containing letters from A-Z is being encoded to numbers using the following mapping: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 Given a non-empty strin 阅读全文
posted @ 2019-10-15 13:19 Schwifty 阅读(134) 评论(0) 推荐(0)
摘要: Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. You have the following 3 operations permitt 阅读全文
posted @ 2019-10-15 10:30 Schwifty 阅读(132) 评论(0) 推荐(0)