Divisor

Time Limit: 1 sec

 

The Problem

In a division problem, the dividend is D, the quotient is Q and the remainder is R. What is the divisor?

 

Example:

if D = 16, Q = 5 and R = 1 then

Divisor is 3

 

 

The Input

The input file contains only 3 integer numbers D, Q and R (D<=4000, Q<100 and R<20).

 

The Output

Output will show the one integer numbers in a separate line.

 

Sample Input

16 5 1 

 

Sample Output

3

 

 

 

 

Problem Setter: Shahin ShamS