Concatenation of Array LeetCode solution in C++

1
class Solution {
2
 public:
3
  vector<int> getConcatenation(vector<int> &nums) {
4
    int n = nums.size();
5
    for (int i = 0; i < n; i++) {
6
      nums.push_back(nums[i]);
7
    }
8
    return nums;
9
  }
10
};