Contest: Task: Related: TaskA TaskC

Score : $200$ points

A condominium *AtCoder* has $N$ floors, called the $1$-st floor through the $N$-th floor.
Each floor has $K$ rooms, called the $1$-st room through the $K$-th room.

Here, both $N$ and $K$ are one-digit integers, and the $j$-th room on the $i$-th floor has the room number `i0j`

.
For example, the $2$-nd room on the $1$-st floor has the room number $102$.

Takahashi, the manager, got interested in the sum of the room numbers of all rooms in the condominium, where each room number is seen as a three-digit integer. Find this sum.

- $1 \leq N,K \leq 9$
- $N$ and $K$ are integers.

Input is given from Standard Input in the following format:

$N$ $K$

Print the answer.

1 2

203

The condominium has two rooms $101$ and $102$. We have $101+102=203$.

3 3

1818