Introduction - If you have any usage issues, please Google them yourself
Known n individuals (represented by numbers 1, 2, 3,..., n) sit around a round table. K from a number of people start off, the man out of the line to the m; his next person and from 1 to start off, count to m that another person out; so law be repeated until all of the people out round table. Usually, when solving this kind of problem, we put numbers from 0~n-1, and finally [1] results +1, which is the solution of the original problem.