# LeetCode - 1929. Concatenation of Array
### 題目網址：https://leetcode.com/problems/concatenation-of-array/
###### tags: `LeetCode` `Easy` `模擬`

/*
    -LeetCode format-
    Problem: 1929. Concatenation of Array
    Difficulty: Easy
    
    by Inversionpeter
*/



static const auto Initialize = []{
    ios::sync_with_stdio(false); cin.tie(nullptr);
    return nullptr;
}();

class Solution {
public:
    vector<int> getConcatenation(vector<int>& nums) {
        nums.reserve(nums.size() << 1);
        nums.insert(nums.end(), nums.begin(), nums.end());
        return nums;
    }
};