import std.stdio, std.algorithm, std.conv, std.array, std.string, std.math, std.typecons, std.numeric;

void main()
{
    readln;
    auto AS = readln.split.to!(long[]);

    long s;
    foreach (a; AS) {
        if (a%2 == 1) {
            s += a;
        } else if (s) {
            writeln(s);
            s = 0;
        }
    }
    if (s) writeln(s);
}