Given the set of integers, find the sum of all positive integers in it. Solutions can be sent in any language supported by SPOJ except Whitespace.

Input

t – number of test cases [t < 1000]
On each of next t lines given a integer N [-1000 <= N <= 1000]

Output

One integer equals to sum of all positive integers.

Score

Score equals to size of source code of your program except symbols with ASCII code <= 32.

Example

Input:
4
5
-5
6
-1

Output:
11