First and last occurrences of x

//User function Template for Java


class GFG
{
    ArrayList<Integer> find(int arr[], int n, int x)
    {
        // code here
        
        ArrayList<Integer> list = new ArrayList<>();
        int left = -1, right = -1;
        
        if(arr[0] == x)
        {
            left = 0;
            
        }
        
        if(arr[n-1] == x)
        {
            right = n-1;
        }
        
        for(int i=1; i<n ;i++)
        {
            if(arr[i-1] < arr[i] && arr[i] == x)
            {
                left = i;
                
            }
            
            if(arr[i-1]  < arr[i] && arr[i-1] == x)
            {
                right = i-1;
                
            }
            
        }
        
        list.add(left); list.add(right);
        
        return list;
        
        
        
        
    }
}