Introduction - If you have any usage issues, please Google them yourself
t's numbered 1, 2... N's n individual sits in a clockwise circle, each holding a password (positive integer). One began to choose a positive integer as the number of the upper limit of M, starting from the first person in a clockwise direction from 1 to the beginning of the order number, back off m stop. Who reported m out of line, his password as the new m value, from the next person in a clockwise direction began to count off from 1, and so on, until all the columns so far.