#include <iostream>
using namespace std;
int main()
{
int n, a[1001], s = 0;
cin >> n;
for (int i = 1; i <= n; ++i)
{
cin >> a[i];
int ca = abs(a[i]), sc = 0;
while (ca)
{
sc += ca % 10;
ca /= 10;
}
if (sc % 2 != 0)
{
s += abs(a[i]);
}
}
cout << s;
return 0;
}