README_EN.md

16.01. Swap Numbers

中文文档

Description

Write a function to swap a number in place (that is, without temporary vari­ ables).

Example:

Input: numbers = [1,2]

Output: [2,1]

Note:

• numbers.length == 2

Solutions

Python3

class Solution:
    def swapNumbers(self, numbers: List[int]) -> List[int]:
        numbers[0] ^= numbers[1]
        numbers[1] ^= numbers[0]
        numbers[0] ^= numbers[1]
        return numbers

Java

class Solution {
    public int[] swapNumbers(int[] numbers) {
        numbers[0] ^= numbers[1];
        numbers[1] ^= numbers[0];
        numbers[0] ^= numbers[1];
        return numbers;
    }
}

TypeScript

function swapNumbers(numbers: number[]): number[] {
    numbers[0] ^= numbers[1];
    numbers[1] ^= numbers[0];
    numbers[0] ^= numbers[1];
    return numbers;
}

C++

class Solution {
public:
    vector<int> swapNumbers(vector<int>& numbers) {
        numbers[0] ^= numbers[1];
        numbers[1] ^= numbers[0];
        numbers[0] ^= numbers[1];
        return numbers;
    }
};

Go

func swapNumbers(numbers []int) []int {
	numbers[0] ^= numbers[1]
	numbers[1] ^= numbers[0]
	numbers[0] ^= numbers[1]
	return numbers
}

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