有些游戏就是怪。看来能猜中的偏偏猜不中。看来猜不中的偏偏又猜中了。现有这么一个故事,我们不妨一起来听一听:小牛和小马、小羊在一起做游戏。小牛用两小张纸片,各写了一个数。这两个数都是正整数,相差是1。他把一张纸片贴在小马的额头上,另一张贴在小羊的额头上。于是,两个人只能看到对方额头上的数字,而看不到自己头上的数字。小牛不断地问他们, Some games are strange. It seems that we can guess the guess. It seems that the guessing guess again. The existing such a story, we may wish to hear together: the calf and pony, lamb playing games together. Calf with two small pieces of paper, each written a few. Both numbers are positive integers with a difference of one. He put a piece of paper on the pony’s forehead and the other on the lamb’s forehead. Thus, two people can only see each other’s forehead figures, but can not see the number on his head. Mavericks continue to ask them,