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Week 9: January 11 - 17. Pointers. References

Twice the minimum

The array of real numbers is given. Calculate the twice value of the minimum element in array.

Input

First line contains the number n (n100) of elements in array. Second line contains n real numbers - the elements of array. Each value does not exceed 100 by absolute value.

Output

Print the twice value of the minimum element in array with 2 decimal digits.

Time limit 1 second
Memory limit 128 MiB
Input example #1
6
6 7.5 2.1 2.0 0 -3


Output example #1
-6.00
Source SFE-2010 Variant 17