角斗士可以在3 扇门中作一选择，1 扇门后是美女，他因此获得自由并成婚，另外2

扇后面是头狮子。当角斗士选定其一后，皇帝（他知道每扇门的安排）将打开另外两扇门之

一给角斗士看，其结果是狮子。然后他问角斗士是否要改变他的最初选择，换成另外一扇没

打开的门。请用程序说明，改变选择对角斗士是否有利。-Gladiator to make a choice in the 3 door, a door is beautiful, so he freed and married, and two behind the lions. When Gladiator selected First Emperor (he knows every door arrangements) will look to open one of two doors to the Gladiator, the result is a lion. Then he asked the Gladiator his first choice if you want to change, and switch to the other one did not open the door. With a descr iption of the procedures to change whether Gladiator.