#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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