[LeetCode][Python] | 1859. Sorting the Sentence

A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each word consists of lowercase and uppercase English letters.

A sentence can be shuffled by appending the 1-indexed word position to each word then rearranging the words in the sentence.

• For example, the sentence "This is a sentence" can be shuffled as "sentence4 a3 is2 This1" or "is2 sentence4 This1 a3".

Given a shuffled sentence s containing no more than 9 words, reconstruct and return the original sentence.

 

Example 1:

Input: s = "is2 sentence4 This1 a3"
Output: "This is a sentence"
Explanation: Sort the words in s to their original positions "This1 is2 a3 sentence4", then remove the numbers.

 

Example 2:

Input: s = "Myself2 Me1 I4 and3"
Output: "Me Myself and I"
Explanation: Sort the words in s to their original positions "Me1 Myself2 and3 I4", then remove the numbers.

 

Constraints:

• 2 <= s.length <= 200
• s consists of lowercase and uppercase English letters, spaces, and digits from 1 to 9.
• The number of words in s is between 1 and 9.
• The words in s are separated by a single space.
• s contains no leading or trailing spaces.

 

class Solution:
    def sortSentence(self, s: str) -> str:

        dic = {}
        for i in s.split():
            dic[i[-1]] = i[:-1]

        final = []
        for num, word in sorted(dic.items()):
            final.append(word)
        return " ".join(final)

# (runtime / memory)
#  24 ms / 14.3 MB



class Solution:
    def sortSentence(self, s: str) -> str:

        dic = {}
        for i in s.split():
            dic[i[-1]] = i[:-1]

        final = [word for num, word in sorted(dic.items())]
        return " ".join(final)

# (runtime / memory)
#  28 ms / 14.4 MB



class Solution:
    def sortSentence(self, s: str) -> str:

        words = s[::-1].split()
        result = [word[1:][::-1] for word in sorted(words)]
        return ' '.join(result)

# (runtime / memory)
#  32 ms / 14.1 MB

 

 

Click the link if you want to check a solution using JavaScript: https://momentarycomfort.tistory.com/683

[LeetCode][JavaScript] | 1859. Sorting the Sentence