A sentence is a list of words that are separated by a single space with no leading or trailing spaces. Each of the words consists of only uppercase and lowercase English letters (no punctuation).
- For example,
"Hello World","HELLO", and"hello world hello world"are all sentences.
You are given a sentence s and an integer k. You want to truncate s such that it contains only the first k words. Return s after truncating it.
Example 1:
Input: s = "Hello how are you Contestant", k = 4
Output: "Hello how are you"
Explanation:
The words in s are ["Hello", "how" "are", "you", "Contestant"].
The first 4 words are ["Hello", "how", "are", "you"].
Hence, you should return "Hello how are you".
Example 2:
Input: s = "What is the solution to this problem", k = 4
Output: "What is the solution"
Explanation:
The words in s are ["What", "is" "the", "solution", "to", "this", "problem"].
The first 4 words are ["What", "is", "the", "solution"].
Hence, you should return "What is the solution".
Example 3:
Input: s = "chopper is not a tanuki", k = 5
Output: "chopper is not a tanuki"
Constraints:
1 <= s.length <= 500kis in the range[1, the number of words in s].sconsist of only lowercase and uppercase English letters and spaces.- The words in
sare separated by a single space. - There are no leading or trailing spaces.