## ACM International Collegiate Programming Contest 95/96

**Sponsored by Microsoft**

### Central European Regional Contest

## Problem H: Sticks

**Input file:** `sticks.in`

**Output file:** `sticks.out`

**Program file:** `sticks.pas` or `sticks.cpp`

George took sticks of the same length and cut them randomly until all parts became at most 64 units
long. Now he wants to return sticks to the original state, but he forgot how many sticks he had originally and
how long they were originally. Please help him and design a program which computes the smallest possible
original length of those sticks. All lengths expressed in units are integers greater than zero.

### Input

The input file contains blocks of 2 lines. The first line contains the number of sticks parts after cutting.
The second line contains the lengths of those parts separated by the space. The last line of the file contains
zero.
### Output

The output file contains the smallest possible length of original sticks, one per line.
### Example

**Input file:**
9
5 2 1 5 2 1 5 2 1
4
1 2 3 4
0

**Output file:**
6
5