摘要:题目自己的解决方法其他解决方法
1.题目
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.
For convenience, the full table for the 26 letters of the English alphabet is given below:
[".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."]
Now, given a list of words, each word can be written as a concatenation of the Morse code of each letter. For example, "cba" can be written as "-.-..--...", (which is the concatenation "-.-." + "-..." + ".-"). We"ll call such a concatenation, the transformation of a word.
Return the number of different transformations among all words we have.
Example: Input: words = ["gin", "zen", "gig", "msg"] Output: 2 Explanation: The transformation of each word is: "gin" -> "--...-." "zen" -> "--...-." "gig" -> "--...--." "msg" -> "--...--." There are 2 different transformations, "--...-." and "--...--.".
自己的解决方法
class Solution: def uniqueMorseRepresentations(self, words: List[str]) -> int: final_set = set() mosLIst = [".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."] for word in words: temp = "" for i in word: temp += mosLIst[ord(i)-97] final_set.add(temp) return len(final_set)
Runtime: 36 ms, faster than 97.45% of Python3 online submissions for Unique Morse Code Words. Memory Usage: 12.9 MB, less than 5.36% of Python3 online submissions for Unique Morse Code Words.
3.其他解决方法
const codes = [".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."] const getIdx = char => char.charCodeAt(0) - "a".charCodeAt(0) var uniqueMorseRepresentations = function(words) { return words.map( word => word.split("") .map( char => codes[getIdx(char)]) .join("")) .reduce((set, cur) => set.add(cur), new Set()) .size };
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摘要:题目自己的解决方法其他解决方法 1.题目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...
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