# Problem Statement :

Vasya has n pairs of socks. In the morning of each day Vasya has to put on a pair of socks before he goes to school. When he comes home in the evening, Vasya takes off the used socks and throws them away. Every m-th day (at days with numbers m, 2m, 3m, …) mom buys a pair of socks to Vasya. She does it late in the evening, so that Vasya cannot put on a new pair of socks before the next day. How many consecutive days pass until Vasya runs out of socks?

# Input Format:

The single line contains two integers n and m (1 ≤ n ≤ 100; 2 ≤ m ≤ 100), separated by a space.

# Output Format:

Print a single integer — the answer to the problem.

Given:

Output:

# Approach:

The answer can be calculated using the formula:

where ⌊ x⌋ is the integer part of x.

# Code:

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