알고리즘/LeetCode

LeetCode 풀기 - 1812. Determine Color of a Chessboard Square

앤테바 2021. 11. 21. 13:21
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1812. Determine Color of a Chessboard Square

https://leetcode.com/problems/determine-color-of-a-chessboard-square/

 

Determine Color of a Chessboard Square - LeetCode

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문제)

솔루션1)

class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:
        # black -> False
        # white = True
        d = {
            'a': 1,
            'b': 0,
            'c': 1,
            'd': 0,
            'e': 1,
            'f': 0,
            'g': 1,
            'h': 0,            
        }
        
        if d[coordinates[0]] == 1 and int(coordinates[1]) % 2 == 1:
            return False
        elif d[coordinates[0]] == 0 and int(coordinates[1]) % 2 == 0:
            return False
        return True

솔루션2)

솔루션1)d의 hash 자료구조를 문자를 ord()를 이용해서 ascii number로 변환하는 방법으로 대체할 수 있습니다.

class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:
        return ord(coordinates[0]) % 2 != int(coordinates[1]) % 2

솔루션3)

굉장히 직관적인 솔루션입니다.

이보 다 더 심플할 순 없다...

class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:
        if coordinates[0] in 'aceg':
            return coordinates[1] in '2468'
        else:
            return coordinates[1] in '1357'
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