用育种算法求解售货商问题。设有10个城市，售货商从0号城市出发要把货物送到其他9个城市，且每个城市只能达到一次，最后回到0号城市-breeding algorithm used to solve the problem of goods sold. With 10 cities, sales from 0 to cities starting the goods should be sent to the other nine citi