#include <stdio.h>
int sum_even_numbers(int *ptr, int n) {
int i;
int sum = 0;
for(i = 0; i < n; i++){
if((*ptr % 2) == 0){
sum += *ptr;
}
ptr++;
}
return sum;
}
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;
}