Problem Statement

You are given integers $A$ and $B$, in base $K$.
Print $A \\times B$ in decimal.

Notes

For base-$K$ representation, see Wikipedia's article on Positional notation.

Constraints

• $2 \\leq K \\leq 10$
• $1 \\leq A,B \\leq 10^5$
• $A$ and $B$ are in base-$K$ representation.

Input

Input is given from Standard Input in the following format:

$K$ $A$ $B$

Output

Print the answer.

Sample Input 1

2
1011 10100

Sample Output 1

220

1011 in base $2$ corresponds to $11$ in base $10$.
10100 in base $2$ corresponds to $20$ in base $10$.
We have $11 \\times 20 = 220$, so print $220$.

Sample Input 2

7
123 456

Sample Output 2

15642

123 in base $7$ corresponds to $66$ in base $10$.
456 in base $7$ corresponds to $237$ in base $10$.
We have $66 \\times 237 = 15642$, so print $15642$.