If we delete the mth number from a circle which is composed of numbers 0, 1, …, n-1 counting from 0 at every time, what is the last number?
For example, a circle is composed of five numbers 0, 1, 2, 3, 4. If we delete the 3rd number at every time, the deleted numbers are in order of 2, 0, 4, 1, so the last remaining number is 3.