使用队列编程解决舞伴问题

舞伴问题可以使用队列来解决。具体的思路是：将男生和女生分别放入两个队列中，然后按照队列先进先出的原则，依次匹配男生和女生。

具体实现步骤如下：

1. 创建两个队列，一个用于存放男生，一个用于存放女生。

male_queue = []
female_queue = []

2. 将男生和女生分别添加到对应的队列中。

male_queue.append("Tom")
male_queue.append("Jack")
female_queue.append("Lucy")
female_queue.append("Alice")

3. 循环遍历两个队列，依次匹配男生和女生。

while len(male_queue) > 0 and len(female_queue) > 0:
    male = male_queue.pop(0)
    female = female_queue.pop(0)
    print(male, " dance with ", female)

4. 如果男生或女生队列为空，则表示有人没有匹配上舞伴。

if len(male_queue) > 0:
    print("The following male dancers have not found a partner: ", male_queue)
if len(female_queue) > 0:
    print("The following female dancers have not found a partner: ", female_queue)

完整代码如下：

male_queue = []
female_queue = []

male_queue.append("Tom")
male_queue.append("Jack")
female_queue.append("Lucy")
female_queue.append("Alice")

while len(male_queue) > 0 and len(female_queue) > 0:
    male = male_queue.pop(0)
    female = female_queue.pop(0)
    print(male, " dance with ", female)

if len(male_queue) > 0:
    print("The following male dancers have not found a partner: ", male_queue)
if len(female_queue) > 0:
    print("The following female dancers have not found a partner: ", female_queue)