#include <stdio.h>
int main() {
int arr[5] = {5, 4, 3, 2, 1};
int sum = 0;
for (int i = 0; i < 5; ++i) {
if (arr[i] % 2 == 0)
sum -= arr[i];
else
sum += arr[i];
}
printf("%d", sum);
return 0;
}
