1486-XOROperationInAnArray.go

package main

// 1486. XOR Operation in an Array
// You are 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.

// Example 1:
// Input: n = 5, start = 0
// Output: 8
// Explanation: Array nums is equal to [0, 2, 4, 6, 8] where (0 ^ 2 ^ 4 ^ 6 ^ 8) = 8.
// Where "^" corresponds to bitwise XOR operator.

// Example 2:
// Input: n = 4, start = 3
// Output: 8
// Explanation: Array nums is equal to [3, 5, 7, 9] where (3 ^ 5 ^ 7 ^ 9) = 8.

// Constraints:
//     1 <= n <= 1000
//     0 <= start <= 1000
//     n == nums.length

import "fmt"

func xorOperation(n int, start int) int {
    res := start
    for i := 1; i < n ; i++ {
        res ^= (start + 2 * i)
    }
    return res
}

func main() {
    // Array nums is equal to [0, 2, 4, 6, 8] where (0 ^ 2 ^ 4 ^ 6 ^ 8) = 8
    fmt.Println(xorOperation(5, 0)) // 8

    // Array nums is equal to [3, 5, 7, 9] where (3 ^ 5 ^ 7 ^ 9) = 8
    fmt.Println(xorOperation(4, 3)) // 8
}