0MS || SIMPLE JAVA SOLUTION
```\nclass Solution {\n    public int[] getConcatenation(int[] nums) {\n        int[] ans = new int[2 * nums.length];\n        for(int i = 0; i < nums.length; i
```\nclass Solution {\n    public int[] getConcatenation(int[] nums) {\n        int[] ans = new int[2 * nums.length];\n        for(int i = 0; i < nums.length; i++){\n            ans[i] = ans[i + nums.length] = nums[i];\n        }\n        \n        return ans;\n    }\n}
['Java']