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).
\n\n"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.
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Example 1:
\n\n\nInput: s = "Hello how are you Contestant", k = 4\nOutput: "Hello how are you"\nExplanation:\nThe words in s are ["Hello", "how" "are", "you", "Contestant"].\nThe first 4 words are ["Hello", "how", "are", "you"].\nHence, you should return "Hello how are you".\n\n\n
Example 2:
\n\n\nInput: s = "What is the solution to this problem", k = 4\nOutput: "What is the solution"\nExplanation:\nThe words in s are ["What", "is" "the", "solution", "to", "this", "problem"].\nThe first 4 words are ["What", "is", "the", "solution"].\nHence, you should return "What is the solution".\n\n
Example 3:
\n\n\nInput: s = "chopper is not a tanuki", k = 5\nOutput: "chopper is not a tanuki"\n\n\n
\n
Constraints:
\n\n1 <= s.length <= 500k is in the range [1, the number of words in s].s consist of only lowercase and uppercase English letters and spaces.s are separated by a single space.Compiled with clang 11 using the latest C++ 17 standard.
Your code is compiled with level two optimization (-O2). AddressSanitizer is also enabled to help detect out-of-bounds and use-after-free bugs.
Most standard library headers are already included automatically for your convenience.
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\\r\\n\\r\\n1. Adding an item to a hash.\\r\\n
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Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms
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