using System;
class HelloWorld {
static long Suma2(int[]T1, int n) {
if (T1 == null || T1.Length == 0 || T1.Length <= n) return 0;
long rek = Suma2(T1, ++n);
if (n % 2 == 0 && T1[n] % 2 == 0)
return T1[n] + rek;
return rek;
}
static void Main(string[] args) {
int[] T = { 1, 22, 3, 15, 60, 35, 4, 6, 10 };
Console.WriteLine(Suma2(T, 4));
}
}