You are given an array of integers
. Suppose
is any array of
integers. Find the minimum possible positive value of
.
Constraints
At least one .
Input Specification
The first line contains an integer, .
The next line contains space-separated integers,
.
Output Specification
Output the minimum positive value of .
Sample Input
3
2 -1 3
Sample Output
1
Explanation for Sample
One possible value for array is
. Then,
. This is the minimum positive value of
amongst all values of
.
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