#include <stdio.h>
int sum_even_numbers(int *ptr, int n) {
// Your logic here
//return 0;
int result = 0;
for (int x = 0; x < n; x++)
{
//check if number is even
if((*(ptr + x) % 2) == 0)
{
result += *(ptr + x);
}
}
return result;
}
int main() {
int n;
scanf("%d", &n);
int arr[100];
for (int i = 0; i < n; i++) {
scanf("%d", &arr[i]);
}
int result = sum_even_numbers(arr, n);
printf("Sum = %d", result);
return 0;
}