1486. XOR Operation in an Array

Given an integer n and an integer start.

Define an array nums where nums[i] = start + 2*i (0-indexed) and n == nums.length.

Return the bitwise XOR of all elements of nums.

• 1 <= n <= 1000
• 0 <= start <= 1000
• n == nums.length

一次异或就行

class Solution(object):
    def xorOperation(self, n, start):
        """
        :type n: int
        :type start: int
        :rtype: int
        """
        ans = 0
        for i in range(n):
            ans ^= (start + i * 2)
        return ans