Solve the programming task below in a Python markdown code block.
Remainder of Big Integers

Given two integers $A$ and $B$, compute the remainder of $\frac{A}{B}$.

Input

Two integers $A$ and $B$ separated by a space character are given in a line.

Output

Print the remainder in a line.

Constraints

* $0 \leq A, B \leq 10^{1000}$
* $B \ne 0$



Sample Input 1


5 8


Sample Output 1


5


Sample Input 2


100 25


Sample Output 2


0






Example

Input

5 8


Output

5