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[leetCode] 744. Find Smallest Letter Greater Than Target (Python) 본문

Programming/코딩 1일 1문제

[leetCode] 744. Find Smallest Letter Greater Than Target (Python)

사용자 솜씨좋은장씨 2020. 12. 5. 17:12

Given a list of sorted characters letters containing only lowercase letters, and given a target letter target, find the smallest element in the list that is larger than the given target.

Letters also wrap around. For example, if the target is target = 'z' and letters = ['a', 'b'], the answer is 'a'.

 

Examples:

Input:
letters = ["c", "f", "j"]
target = "a"
Output: "c"

Input:
letters = ["c", "f", "j"]
target = "c"
Output: "f"

Input:
letters = ["c", "f", "j"]
target = "d"
Output: "f"

Input:
letters = ["c", "f", "j"]
target = "g"
Output: "j"

Input:
letters = ["c", "f", "j"]
target = "j"
Output: "c"

Input:
letters = ["c", "f", "j"]
target = "k"
Output: "c"

Note:

  1. letters has a length in range [2, 10000].
  2. letters consists of lowercase letters, and contains at least 2 unique letters.
  3. target is a lowercase letter.

Solution

class Solution:
    def nextGreatestLetter(self, letters: List[str], target: str) -> str:
        answer = letters[0]
        
        for i in range(len(letters)):
            if letters[i] > target:
                answer = letters[i]
                break
        
        return answer

 

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