题解 | 灵异背包？
灵异背包？
https://www.nowcoder.com/practice/812bcedbbe244c9b86e459a244af5ddf
n=int(input())
a=list(map(int,input().split()))
if sum(a)%2==0:
print(sum(a))
else:
a.sort()
for i in a:
if i%2==1:
res=sum(a)-i
print(res)
break
