Truncate Sentence — LeetCode 1816 Python Solution

The problem

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).

Example

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"].

Python solution

class Solution:
    def truncateSentence(self, s: str, k: int) -> str:
        return ' '.join(s.split()[:k])

Complexity

Pattern: Hash Map

Trade memory for time: remember what you have seen so the second pass never happens. LeetCode 1816. Truncate Sentence is filed here because the reference solution below belongs to the algorithm family this hub collects, even though its LeetCode tags point elsewhere.

The hash map guide has the Python template for the pattern and the 709 LeetCode problems that use it.

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