C++

1/**
2 * Runtime: 0 ms, faster than 100.00%
3 * Memory Usage: 6.1 MB
4 */
5class Solution {
6  public:
7    int xorOperation(int n, int start) {
8      int result = start;
9      for(int i=1; i<n; ++i) 
10      {
11        result = result ^ (start + 2*i);
12      }
13
14      return result;
15    }
16};

JavaScript

1/**
2 * Runtime: 60 ms, faster than 100.00%
3 * Memory Usage: 38.2 MB, less than 83.71%
4 */
5var xorOperation = function(n, start) {
6  let result = start;
7
8  for (let i=1; i<n; ++i) {
9    result = result ^ (start + 2*i);
10  }
11
12  return result;
13};

Ruby

1# Runtime: 56 ms, faster than 37.50%
2# Memory Usage: 210 MB, less than 6.25%
3def xor_operation(n, start)
4  result = start
5  for i in (1...n) do 
6    result = result ^ (start + 2*i) 
7  end
8
9  result
10end