约瑟夫患加密算法，输入总人数N，和开始的号，隔M个人出队。例：总人数6，从第3个人开始，隔2个人出一个人。-Joseph suffering encryption algorithm, enter the total number N, and the beginning of the number, every M personal dequeue. Example: The total number of 6, 3 personal, one out of every 2 individua