class Solution {
public:
string truncateSentence(string s, int k) {
}
};
1816. 截断句子
句子 是一个单词列表,列表中的单词之间用单个空格隔开,且不存在前导或尾随空格。每个单词仅由大小写英文字母组成(不含标点符号)。
"Hello World"
、"HELLO"
和 "hello world hello world"
都是句子。给你一个句子 s
和一个整数 k
,请你将 s
截断 ,使截断后的句子仅含 前 k
个单词。返回 截断 s
后得到的句子。
示例 1:
输入:s = "Hello how are you Contestant", k = 4 输出:"Hello how are you" 解释: s 中的单词为 ["Hello", "how" "are", "you", "Contestant"] 前 4 个单词为 ["Hello", "how", "are", "you"] 因此,应当返回 "Hello how are you"
示例 2:
输入:s = "What is the solution to this problem", k = 4 输出:"What is the solution" 解释: s 中的单词为 ["What", "is" "the", "solution", "to", "this", "problem"] 前 4 个单词为 ["What", "is", "the", "solution"] 因此,应当返回 "What is the solution"
示例 3:
输入:s = "chopper is not a tanuki", k = 5 输出:"chopper is not a tanuki"
提示:
1 <= s.length <= 500
k
的取值范围是 [1, s 中单词的数目]
s
仅由大小写英文字母和空格组成s
中的单词之间由单个空格隔开原站题解
golang 解法, 执行用时: 0 ms, 内存消耗: 2.2 MB, 提交时间: 2021-06-09 18:00:45
func truncateSentence(s string, k int) string { arr := strings.Split(s, " ") return strings.Join(arr[:k], " ") }