Copyright

An album contains A songs. The album's copyright average is computed as

(the total number of copyrighted melodies included in the album) / (the number of songs in the album)

and then rounded up to an integer.

Given A and the rounded-up average I, determine the smallest possible total number of copyrighted melodies in the album.

The first line contains two integers A and I.

1 <= A, I <= 100

Print the smallest possible total number of copyrighted melodies.