在子数组的数组中查找最大值

def find_max_value(nested_array):
    max_value = float('-inf')  # 初始化最大值为负无穷大
    
    for element in nested_array:
        if isinstance(element, list):  # 如果元素是列表，则递归查找
            max_value = max(max_value, find_max_value(element))
        else:
            max_value = max(max_value, element)  # 更新最大值
    
    return max_value

# 示例嵌套数组
nested_array = [1, [2, [3, 4], 5], [6, 7, [8, 9]]]
print("最大值是:", find_max_value(nested_array))

def find_max_value_iterative(nested_array):
    max_value = float('-inf')
    stack = [iter(nested_array)]
    
    while stack:
        try:
            elem = next(stack[-1])
            if isinstance(elem, list):
                stack.append(iter(elem))
            else:
                max_value = max(max_value, elem)
        except StopIteration:
            stack.pop()
    
    return max_value

# 使用迭代方法查找最大值
print("最大值是:", find_max_value_iterative(nested_array))