CF389A.Fox and Number Game

Fox Ciel is playing a game with numbers now.

Ciel has $n$ positive integers: $x_{1}$ , $x_{2}$ , ..., $x_{n}$ . She can do the following operation as many times as needed: select two different indexes $i$ and $j$ such that $x_{i}$ > $x_{j}$ hold, and then apply assignment $x_{i}$ = $x_{i}$ - $x_{j}$ . The goal is to make the sum of all numbers as small as possible.

Please help Ciel to find this minimal sum.

The first line contains an integer $n$ ( $2<=n<=100$ ). Then the second line contains $n$ integers: $x_{1}$ , $x_{2}$ , ..., $x_{n}$ ( $1<=x_{i}<=100$ ).

Output a single integer — the required minimal sum.

In the first example the optimal way is to do the assignment: $x_{2}$ = $x_{2}$ - $x_{1}$ .

In the second example the optimal sequence of operations is: $x_{3}$ = $x_{3}$ - $x_{2}$ , $x_{2}$ = $x_{2}$ - $x_{1}$ .