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#include <iostream>
#include <stdint.h>
using namespace std;
int main()
{
	int64_t suma=0;
	int nmin=1000, ilosc, wartosc;
	cin >> ilosc;
	if(ilosc==1){
		cin>> wartosc;
		if(wartosc%2==0){
			cout<< wartosc;
		}
		else{
		cout << "NIESTETY";
	}
	}
	else{
	while(ilosc>0){
		cin >> wartosc;
		suma=suma+wartosc;
		if(wartosc%2!=0 && wartosc<nmin){
			nmin=wartosc;
		}
		--ilosc;
	}
	if(suma%2==0){
		cout << suma;
	}
	else{
		cout << suma-nmin;
	}
}

return 0;
}