class Solution

{

public:

```
int[] twoSum(int[] nums, int target)
{
for (int i = 0; i < nums.length; i++)
{
for (int j = i + 1; j < nums.length; j++)
{
if (nums[j] == target - nums[i])
{
return new int[] { i, j };
}
}
}
throw new IllegalArgumentException("No two sum solution");
}
```

};

I copied the answer, but it still doesn't work...