Accept two positive integers M and N as input. There are two cases to consider:

$(1)$ If M $<$ N$,$ then print M as output.

$(2)$ If M $>=$ N$,$ subtract N from M$.$ Call the difference M$1.$ If M$1>=$ N$,$ then subtract N from M$1$ and call the difference M$2.$ Keep doing this operation until you reach a value k$,$ such that, Mk $<$ N$.$ You have to print the value of Mk as output. In Python $3$