题目描述:
给出第一个词 first 和第二个词 second,考虑在某些文本 text 中可能以 “first second third” 形式出现的情况,其中 second 紧随 first 出现,third 紧随 second 出现。对于每种这样的情况,将第三个词 “third” 添加到答案中,并返回答案。
提示:
- 1 <= text.length <= 1000
- text 由一些用空格分隔的单词组成,每个单词都由小写英文字母组成
- 1 <= first.length, second.length <= 10
- first 和 second 由小写英文字母组成
示例 1:
输入:text = “alice is a good girl she is a good student”, first = “a”, second = “good”
输出:[“girl”,“student”]
示例 2:
输入:text = “we will we will rock you”, first = “we”, second = “will”
输出:[“we”,“rock”]
代码如下:
class Solution {
public String[] findOcurrences(String text, String first, String second) {
String[] str = text.split(" ");
int n = str.length;
ArrayList<String> arr = new ArrayList<>();
for (int i = 0; i < n - 2; i++) {
if (str[i].equals(first) && str[i + 1].equals(second)) {
arr.add(str[i + 2]);
}
}
int len = arr.size();
String[] S = new String[len];
for (int i = 0; i < len; i++) {
S[i] = arr.get(i);
}
return S;
}
}
执行结果: