with C
\n\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* getConcatenation(int* nums, int numsSize, int* returnSize){\n*re
```\n\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* getConcatenation(int* nums, int numsSize, int* returnSize){\n*returnSize = numsSize*2;\nint * ans=(int*)malloc(sizeof(int)*(numsSize*2));\nfor(int i =0;i<numsSize;i++){\n    ans[i]=nums[i];\n    ans[i+numsSize]=nums[i];\n}\n    return ans;\n}\n```
['C']