Kattis

# Powers and Modulus

Image by geralt

One day you and GTmac walk into a classroom and see a mysterious expression on the blackboard:

$(1^ b + 2^ b + \cdots + a^ b)~ \mathrm{mod}~ a$

Upon seeing the expression GTmac shows an evil smile and challenges you: “Let me give you the values of $a$ and $b$ and let’s assume $b$ is an odd number. Want to bet who can evaluate this expression? The one who loses shall buy pizza for us tonight.”

## Input

The input has two integers $a$ ($1 \leq a \leq 10^9$) and $b$ ($1\leq b\leq 99$, $b$ is odd) on a single line.

## Output

Output the value of the expression with the given $a$ and $b$.

Sample Input 1 Sample Output 1
2 3

1

Sample Input 2 Sample Output 2
3 7

0

Sample Input 3 Sample Output 3
12345678 9

6172839