# include <iostream>
# include <cstdio>
# include <queue>
# include <vector>
# include <stack>
# include <map>
# include <cmath>
# include <algorithm>
# include <stdio.h>
using namespace std;


int main()
{
freopen ("evensum.out","w",stdout);
freopen ("evensum.in","r",stdin);
int n;
int i,x,minn=1000000005;
long long s=0;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%d",&x);
s+=x;
if(x%2==1&&minn>x)minn=x;
}
if(s%2==1)s-=minn;
printf("%lld\n",s);

}