lc1078. Occurrences After Bigram

1078. Occurrences After Bigram Easy

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Share Given words first and second, consider occurrences in some text of the form "first second third", where second comes immediately after first, and third comes immediately after second.

For each such occurrence, add "third" to the answer, and return the answer.

Example 1:

Input: text = "alice is a good girl she is a good student", first = "a", second = "good" Output: ["girl","student"] Example 2:

Input: text = "we will we will rock you", first = "we", second = "will" Output: ["we","rock"]

Note:

1 <= text.length <= 1000 text consists of space separated words, where each word consists of lowercase English letters. 1 <= first.length, second.length <= 10 first and second consist of lowercase English letters.

思路：老老实实遍历

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代码：python3

class Solution:
    def findOcurrences(self, text: str, first: str, second: str) -> List[str]:
        arr = text.split()
        s=[]
        for index,value in enumerate(arr):
            if index+2>=len(arr):return s
            if arr[index]==first and arr[index+1]==second :
                s.append(arr[index+2])

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转载于:https://juejin.im/post/5d0722a6f265da1b6b1cd5cc