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.

Example 3:

Input: n = 1, start = 7

Output: 7

Example 4:

Input: n = 10, start = 5

Output: 2

Constraints:

1 <= n <= 1000

0 <= start <= 1000

n == nums.length

1 2 3 4 5 6 7 | int xorOperation(int n, int start){ int ret = 0; for(int i=0;i<n;++i){ ret^=(start+(i<<1)); } return ret; } |

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