美国有一个叫四橡镇的地方。据说四橡镇的得名与一位早期移民有关,此人拥有一块土地。临终之前,他立下遗嘱,规定要按照四株老橡树的位置划分土地,平分给他的四个儿子,每个儿子所分到的土地当中必须有一棵老橡树,不准将树移植,只能维持现状。若有一棵树死亡,那就将这块土地充公。美国趣味数学大师山姆先生把这个故事改编成了一道智力趣题。设想:老头子的这块地是一块8×8的正方形,四棵橡树排列在对边 The United States has a place called Siqiang. It is said that the name of Siqu Town is related to an early immigrant who owns a piece of land. Before his death, he made a will which stipulated that the land should be divided according to the location of the four old oaks, equally divided among the four sons given to him, and each son must have an old oak in the land to which he was assigned, Maintain the status. If a tree dies, it will be confiscated. Sam, an American math guru, adapted the story to an intellectual quest. Assumption: The old man’s piece of land is a 8 × 8 square, four oak trees arranged on the opposite side