#include<bits/stdc++.h>
#define MOD 1000000007
#define ll long long
using namespace std;
 
int main()
{
    std::ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    int a[n];
    ll res=0;
    vector<int> b;
    for (int i=0; i<n; ++i)
    {
        cin >> a[i];
        if (a[i]%2==1) b.push_back(a[i]);
        else res+=a[i];
    }
    sort(b.begin(), b.end());
    if (b.empty()) cout << 0;
    else 
    {
        for (int i=0; i<b.size(); ++i) res+=b[i];
        if (res%2==0) res-=b[0];
    }
    cout << res;
}

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