README_EN.md

1812. Determine Color of a Chessboard Square

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Description

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.

 

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'

Solutions

Python3

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

Java

class Solution {
    public boolean squareIsWhite(String coordinates) {
        return (coordinates.charAt(0) + coordinates.charAt(1)) % 2 == 1;
    }
}

C++

class Solution {
public:
    bool squareIsWhite(string coordinates) {
        return (coordinates[0] + coordinates[1]) % 2;
    }
};

Go

func squareIsWhite(coordinates string) bool {
	return (coordinates[0]+coordinates[1])%2 == 1
}

JavaScript

/**
 * @param {string} coordinates
 * @return {boolean}
 */
var squareIsWhite = function (coordinates) {
    const x = coordinates.charAt(0).charCodeAt();
    const y = coordinates.charAt(1).charCodeAt();
    return (x + y) % 2 == 1;
};

TypeScript

function squareIsWhite(coordinates: string): boolean {
    return ((coordinates.charCodeAt(0) + coordinates.charCodeAt(1)) & 1) === 1;
}

Rust

impl Solution {
    pub fn square_is_white(coordinates: String) -> bool {
        let s = coordinates.as_bytes();
        s[0] + s[1] & 1 == 1
    }
}

C

bool squareIsWhite(char* coordinates) {
    return (coordinates[0] + coordinates[1]) & 1;
}

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