Given an input string s, reverse the order of the words.

A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space.

Return a string of the words in reverse order concatenated by a single space.

Note that s may contain leading or trailing spaces or multiple spaces between two words. The returned string should only have a single space separating the words. Do not include any extra spaces.


Example 1:

Input: s = "the sky is blue"
Output: "blue is sky the"
Example 2:

Input: s = "  hello world  "
Output: "world hello"
Explanation: Your reversed string should not contain leading or trailing spaces.
Example 3:

Input: s = "a good   example"
Output: "example good a"
Explanation: You need to reduce multiple spaces between two words to a single space in the reversed string.
Example 4:

Input: s = "  Bob    Loves  Alice   "
Output: "Alice Loves Bob"
Example 5:

Input: s = "Alice does not even like bob"
Output: "bob like even not does Alice"
 

Constraints:

1 <= s.length <= 104
s contains English letters (upper-case and lower-case), digits, and spaces ' '.
There is at least one word in s.

Difficulty: interview

Starter code:

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

Solutions:
class Solution:
    def reverseWords(self, s: str) -> str:
        sLst = s.split()
        # print(sLst)
        reverseStr = ""

        for i in range(len(sLst)-1,-1,-1):
            if i == (len(sLst)-1):
                reverseStr+=sLst[i]
            else:
                reverseStr+=(" "+sLst[i])
        return reverseStr

class Solution:
    def reverseWords(self, s: str) -> str:
        s = s.strip(' ')
        ans = ""
        
        for segment in s.split(' '):
            if segment == '':
                continue
            ans = segment + " " + ans
        
        return ans[:-1]

class Solution:
    def reverseWords(self, s: str) -> str:
        return " ".join(s.split()[::-1])

class Solution:
    def reverseWords(self, s: str) -> str:
        s = s.strip().split()
        l = []
        for i in reversed(range(len(s))):
            l.append(s[i])
        return ' '.join(l)

class Solution:
    def reverseWords(self, s: str) -> str:
        a = s.split()[::-1]
        return " ".join(a)

class Solution:
    def reverseWords(self, s: str) -> str:
        curr_word = ""
        ans = []
        
        for char in s:
            if char == ' ':
                if curr_word != "":   # if it is a newly separately word
                    ans.append(curr_word)
                    curr_word = ""
            else:
                curr_word += char
        
        if curr_word != "":
            ans.append(curr_word)
        
        return " ".join(ans[::-1])