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

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