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Quick start C

Sum of negative

Find the sum of negative integers in the given array.

Input

The first line contains the number n. The second line contains n integers, each no more than 100 by absolute value.

Output

Print the sum of negative integers in the array. If there is no negative integers in array, print 0.

Time limit 1 second
Memory limit 128 MiB
Input example #1
5
-5 6 8 -3 0
Output example #1
-8
Author Michael Medvedev