Maximum Pleasure Value

You are given an integer k and a non-empty string s. In one operation, you gain a pleasure value equal to the length of the string. You must perform exactly k operations. The goal is to compute the maximum possible total pleasure value you can obtain.

The total pleasure value is computed as:

$$Total\;Pleasure = k \times |s|$$

where \(|s|\) denotes the length of the string s.

For example, if k = 2 and s = "abcde" then the total pleasure value is 2 \times 5 = 10.

inputFormat

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

Line 1: An integer k representing the number of operations.
Line 2: A string s whose length contributes to the pleasure value per operation.

outputFormat

Output a single integer which is the maximum total pleasure value obtained after performing exactly k operations.

The output should be printed to standard output.

## sample

2
abcde

10