随机图算法

使用前面提到的 Fisher-Yates随机算法（在O（n）时间内）

int X = 3;  int Y = 4;int[] array = new int[X * Y];for (int i = 0; i < array.Length; i++) array[i] = i;FisherYatesShuffle(array);var randomSlots = array.Select((i,j) => new {x=array[j]%X , y=array[j]/X }) .ToArray();

public static void FisherYatesShuffle<T>(T[] array){    Random r = new Random();    for (int i = array.Length - 1; i > 0; i--)    {        int j = r.Next(0, i + 1);        T temp = array[j];        array[j] = array[i];        array[i] = temp;    }}