#include<stdio.h>
#include<iostream>
#include<string>
#include<algorithm>
using namespace std;
int main(){
int n;
int dan;
int sum;
int temp[110];
while(scanf("%d",&n)!=EOF){
sum = 0;
dan = 0;
for(int i = 0;i<n;i++){
cin>>temp[i];
if(temp[i] %2 != 0){
dan++;
}
}
if (dan == 0 ){
cout<<sum<<endl;
continue;
}
if (dan %2 == 0){
int tem = 0;
sort(temp,temp+n);
for(int i = 0; i<n;i++){
if(tem == 0 &&temp[i] %2 != 0){
tem = 1;
}
else{
sum+=temp[i];
}
}
}
else{
for(int i = 0;i <n;i++){
sum+= temp[i];
}
}
cout<<sum<<endl;
}
}
先计算单数的数量有多少
为零时直接输出0
为偶数时和减去一个最小的奇数
为奇数时直接输出和