原题面中为“In one minute each friend independently from other friends can change the position x x by 1 1 to the left or by 1 1 to the right (i.e. set x := x - 1 x:=x−1 or x := x + 1 x:=x+1 ) or even don't change it.”

翻译为“接下来的一分钟，他们每一个人可以选择：向左走一个单位长度 或 向右走一个单位长度，求一分钟后的三个人的最小距离和。”

很显然漏翻了“or even don't change it”,即他们每个人也可以选择在原地不动。