International Morse Code defines a standard encoding where each letter is mapped to a series of dots and dashes, as follows: "a" maps to ".-", "b" maps to "-...", "c" maps to "-.-.", and so on. F…
819. 最常见的单词 给定一个段落 (paragraph) 和一个禁用单词列表 (banned).返回出现次数最多,同时不在禁用列表中的单词. 题目保证至少有一个词不在禁用列表中,而且答案唯一. 禁用列表中的单词用小写字母表示,不含标点符号.段落中的单词不区分大小写.答案都是小写字母. 示例: 输入: paragraph = "Bob hit a ball, the hit BALL flew far after it was hit." banned = ["hit&qu…