Concatenation of Array.cpp

// Given an integer array nums of length n, you want to create an array ans of length 2n where ans[i] == nums[i] and ans[i + n] == nums[i] for 0 <= i < n (0-indexed).

// Specifically, ans is the concatenation of two nums arrays.

// Return the array ans.


class Solution {
public:
    vector<int> getConcatenation(vector<int>& nums) {

            int n = nums.size();

            vector<int> ans(nums.begin(), nums.end());

            for(int i=0;i<n;++i){
                ans.push_back(nums[i]);
            }

            return ans;
    }
};