1816. Truncate Sentence
https://leetcode.com/problems/truncate-sentence
Description
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 <= 500
k
is in the range[1, the number of words in s]
.s
consist of only lowercase and uppercase English letters and spaces.The words in
s
are separated by a single space.There are no leading or trailing spaces.
ac
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