------
## 最终结论
```python
def re_arrange(arr, n):
    positive = []
    negative = []
    
    for num in arr:
        if num >= 0:
            positive.append(num)
        else:
            negative.append(num)
    
    result = []  # Initialize result array
    pos_index = 0
    neg_index = 0
    
    while pos_index < len(positive) and neg_index < len(negative):
        result.append(negative[neg_index])
        result.append(positive[pos_index])
        neg_index += 1
        pos_index += 1
    
    # If there are remaining positive numbers
    while pos_index < len(positive):
        result.append(positive[pos_index])
        pos_index += 1
    
    # If there are remaining negative numbers
    while neg_index < len(negative):
        result.append(negative[neg_index])
        neg_index += 1
    
    return result

# Test cases
assert re_arrange([-5, -2, 5, 2, 4, 7, 1, 8, 0, -8], 10) == [-5, 5, -2, 2, -8, 4, 7, 1, 8, 0]
assert re_arrange([1, 2, 3, -4, -1, 4], 6) == [-4, 1, -1, 2, 3, 4]
assert re_arrange([4, 7, 9, 77, -4, 5, -3, -9], 8) == [-4, 4, -3, 7, -9, 9, 77, 5]
```