Skip to content

Latest commit

 

History

History
65 lines (44 loc) · 2.9 KB

804-unique-morse-code-words.md

File metadata and controls

65 lines (44 loc) · 2.9 KB

804. Unique Morse Code Words - 唯一摩尔斯密码词

国际摩尔斯密码定义一种标准编码方式,将每个字母对应于一个由一系列点和短线组成的字符串, 比如: "a" 对应 ".-", "b" 对应 "-...", "c" 对应 "-.-.", 等等。

为了方便,所有26个英文字母对应摩尔斯密码表如下:

[".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."]

给定一个单词列表,每个单词可以写成每个字母对应摩尔斯密码的组合。例如,"cab" 可以写成 "-.-..--...",(即 "-.-." + "-..." + ".-"字符串的结合)。我们将这样一个连接过程称作单词翻译。

返回我们可以获得所有词不同单词翻译的数量。

例如:
输入: words = ["gin", "zen", "gig", "msg"]
输出: 2
解释: 
各单词翻译如下:
"gin" -> "--...-."
"zen" -> "--...-."
"gig" -> "--...--."
"msg" -> "--...--."

共有 2 种不同翻译, "--...-." 和 "--...--.".

 

注意:

  • 单词列表words 的长度不会超过 100
  • 每个单词 words[i]的长度范围为 [1, 12]
  • 每个单词 words[i]只包含小写字母。

题目标签:String

题目链接:LeetCode / LeetCode中国

题解

Language Runtime Memory
python3 48 ms N/A
import string
class Solution:
    def uniqueMorseRepresentations(self, words):
        """
        :type words: List[str]
        :rtype: int
        """
        mcs = [".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."]
        d = {string.ascii_lowercase[i]: mc for i, mc in enumerate(mcs)}
        return len(set([''.join(map(lambda c: d[c], w)) for w in words]))