import java.util.Scanner;
public class S7_06 {
static int ans;
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while (true) {
int n = sc.nextInt();
if (n <= 0) break;
if (n % 2 != 0) ans += n;
}
System.out.println(ans);
}
}
#include<iostream>
using namespace std;
int main(){
int sum,n;
sum=0;
cin>>n;
while(n>0){
if(n%2==1) sum+=n;
cin>>n;
}
cout<<sum;
return 0;
}