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#include<iostream>
#include<algorithm>

using namespace std;

int suma=0;
int minepar=2000000000;
int n,m;
int hajs;
int main() {
ios::sync_with_stdio(0);
cin>>n;
for(int i=0;i<n;++i) {
cin>>hajs;
suma+=hajs;
if(hajs%2==1 && hajs < minepar) {
minepar=hajs;
}
}
if(suma%2==1) {
suma-=minepar;
}
if(suma%2==0 && suma>0) {
cout<<suma;
}
else {
cout<<"NIESTETY";
}
}