Find the number of $*k*$-divisible numbers on the segment $[*a*, *b*]$. In other words you need to find the number of such integer values $*x*$ that $*a* ≤ *x* ≤ *b*$ and $*x*$ is divisible by $*k*$.

Input

The only line contains three space-separated integers $*k*$, $*a*$ and $*b*$ ($1 ≤ *k* ≤ 10^{18}; - 10^{18} ≤ *a* ≤ *b* ≤ 10^{18}$).

Output

Print the required number.