Problem Description

Mr. Godzilla, who is starting his career as a professional this spring, plans to repay a scholarship of $ M $ million yen over $ N $ months.

The repayment amount for each month is determined by the following rules:

• For the $ i $-th month ( $1 \leq i \leq N-1$ ): The amount is $ M/N $ rounded down to the nearest whole number (in million yen).
• For the $ N $-th month: The remaining unpaid amount.

How many million yen will Mr. Godzilla repay in the $ N $-th month?

Input Format

The input is given from the standard input in the following format:

$ M $ $ N $

Output Format

Output the amount in million yen that Mr. Godzilla will repay in the $ N $-th month.

Sample Input and Output

Sample Input #1

7 3

Sample Output #1

3

Sample Input #2

100 20

Sample Output #2

5

Notes/Hints

Constraints

• All inputs are integers.
• $2 \leq N \leq M \leq 100$

Sample Explanation 1

For the 1st and 2nd months, he repays $ 2 $ million yen each, so in the 3rd month, he repays $ 3 $ million yen.

见题面 Input 部分

见题面 Output 部分