#region 随机链表
        void GetRandomList<T>(ref List<T> list)
        {
    
    
            int i, r = list.Count - 1;
            System.Random rand = new System.Random();
            for (i = 0; i < list.Count; i++)
            {
    
    
                int n = rand.Next(0, r);
                T tem = list[i];
                list[i] = list[n];
                list[n] = tem;
                r--;
            }
        }
//随机数组
        void GetRandomArray<T>(T[] arr)
        {
    
    
            int i, r = arr.Length - 1;
            System.Random rand = new System.Random();
            for (i = 0; i < arr.Length; i++)
            {
    
    
                int n = rand.Next(0, r);
                T tem = arr[i];
                arr[i] = arr[n];
                arr[n] = tem;
                r--;
            }
        }

        #endregion