As winter comes, Bob the penguin notices that ❄️ snowflakes ❄️ come in varying sizes! Interestingly, every snowflake starts out with ~A~ sides, and then branches out ~B~ times with ~A~ sides each!. For example, if a snowflake has ~5~ sides and branches out ~1~ time, then each of the initial ~5~ sides additionally has ~5~ more sides attached to it!

Input Specification

The first line of input contains two space-separated integers ~A~, ~B~, representing the number of initial sides, and the level of branching, respectively.

Output Specification

Output one integer, indicating the total number of resulting sides on the snowflake.

Constraints

~1 \leq A \leq 75~

~0 \leq B \leq 4~

Sample Input

5 1

Sample Output

30

Sample Explanation

There are ~5~ initial sides, and each side has ~5~ more sides attached to them. Therefore, the first level has ~5~ sides, and the second level has ~5 \times 5~ sides, which adds to a total of ~30~ sides.