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import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;

public class kie {

	private static InputStream in;
	
	public static void main(String[] args) throws IOException {
		
		in = new BufferedInputStream(System.in);
		
		int n = nextInt();
		
		if (n == 1) {
			int a = nextInt();
			System.out.println(a % 2 == 0 ? a : "NIESTETY");
			return;
		}
		
		long initialSum = 0;
		
		int minEven = Integer.MAX_VALUE;
		
		int a;
		
		for (int i = 0; i < n; i++) {
			a = nextInt();
			initialSum += a;
			if (a % 2 == 1 && a < minEven) {
				minEven = a;
			}
		}
		
		if (initialSum % 2 == 0) {
			System.out.println(initialSum);
		} else {
			System.out.println(initialSum - minEven);
		}
		
		in.close();
		
		
	}
	
	private static int nextInt() throws IOException {
	    int ret = 0;
	    boolean dig = false;

	    for (int c = 0; (c = in.read()) != -1; ) {
	        if (c >= 48 && c <= 57) {
	            dig = true;
	            ret = ret * 10 + c - 48;
	        } else if (dig) break;
	    }

	    return ret;
	}
	
}