1812. Determine Color of a Chessboard Square

Problem

You are given coordinates, a string that represents the coordinates of a square of the chessboard. Below is a chessboard for your reference.

Return true if the square is white, and false if the square is black.

The coordinate will always represent a valid chessboard square. The coordinate will always have the letter first, and the number second.

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

Example 1:

Input: coordinates = "a1"
Output: false
Explanation: From the chessboard above, the square with coordinates "a1" is black, so return false.

Example 2:

Input: coordinates = "h3"
Output: true
Explanation: From the chessboard above, the square with coordinates "h3" is white, so return true.

Example 3:

Input: coordinates = "c7"
Output: false

Constraints:

• coordinates.length == 2
• 'a' <= coordinates[0] <= 'h'
• '1' <= coordinates[1] <= '8'

Test Cases

1
2

class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:

1
2
3
4
5
6
7
8
9
10
11
12
13
14

import pytest

from solution import Solution


@pytest.mark.parametrize('coordinates, expected', [
    ("a1", False),
    ("h3", True),
    ("c7", False),
])
class Test:
    def test_solution(self,coordinates, expected):
        sol = Solution()
        assert sol.squareIsWhite(coordinates) == expected

Thoughts

相当于 3274. Check if Two Chessboard Squares Have the Same Color 的一半。

Code

1
2
3

class Solution:
    def squareIsWhite(self, coordinates: str) -> bool:
        return (ord(coordinates[0]) ^ ord(coordinates[1])) & 1 == 1

参考资料

• 本文引用

  • 3274. Check if Two Chessboard Squares Have the Same Color

许可协议

本文除了题目描述（Problem）部分之外，其他内容由 Calf 原创，采用 CC BY-NC-SA 4.0 许可协议，转载请注明出处。

分享文章