Competitions
PP2. Week 4: March 29 - April 4
Sum of positive in matrix
Given matrix of size n * n. Find the sum of its positive elements.
Input
First line contains number n (1 ≤ n ≤ 100). Next lines contains the n * n matrix. All numbers in the matrix are no more than 100 by absolute value.
Output
Print the sum of positive numbers in the matrix.
Input example #1
3 4 -2 5 1 -4 -12 0 1 -3
Output example #1
11