LeetCode 434. Number of Segments in a String



You are given a string s, return the number of segments in the string

segment is defined to be a contiguous sequence of non-space characters.

Example 1:

Input: s = "Hello, my name is John"
Output: 5
Explanation: The five segments are ["Hello,", "my", "name", "is", "John"]

Example 2:

Input: s = "Hello"
Output: 1

Example 3:

Input: s = "love live! mu'sic forever"
Output: 4

Example 4:

Input: s = ""
Output: 0


  • 0 <= s.length <= 300
  • s consists of lower-case and upper-case English letters, digits or one of the following characters "!@#$%^&*()_+-=',.:".
  • The only space character in s is ' '.


Just spit the string and count the splits.

Python Solution

class Solution:
    def countSegments(self, s: str) -> int:
        words = s.split()
        return len(words)
  • Time Complexity: O(N).
  • Space Complexity: O(N).

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