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58. Length Of Last Word

String

Problem - Length Of Last Word

Easy

Given a string s consisting of words and spaces, return the length of the last word in the string.

A word is a maximal substring consisting of non-space characters only.

 

Example 1:

Input: s = "Hello World"
Output: 5
Explanation: The last word is "World" with length 5.

Example 2:

Input: s = "   fly me   to   the moon  "
Output: 4
Explanation: The last word is "moon" with length 4.

Example 3:

Input: s = "luffy is still joyboy"
Output: 6
Explanation: The last word is "joyboy" with length 6.

 

Constraints:

  • 1 <= s.length <= 104
  • s consists of only English letters and spaces ' '.
  • There will be at least one word in s.

Solutions

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class Solution:
    def lengthOfLastWord(self, s: str) -> int:
        # spl = s.strip().split(" ")
        # return len(spl[-1])

        i = len(s) - 1
        while i >= 0 and s[i] == " ":
            i -= 1

        j = i
        while j >= 0 and s[j] != " ":
            j -= 1

        return i - j

Submission Stats:

  • Runtime: 0 ms (100.00%)
  • Memory: 17.8 MB (37.70%)