Passing Chain

$N$ football players stand in a line in order to practice their passes. The players are numbered $1$ to $N$. Initially, player $1$ has the ball. All the players have a passing power of $K$. At any point of time, if player $X$ has the ball: - If $X+K \le N$, the ball will be passed to player $X+K$. - Otherwise, the ball will remain with player $X$. You are given $N$ and $K$. Find the number