a=[]
n=list(map(int,input().split()))
while len(n)!=0:
    try:
        s=0
        for i in range(int(n[0])):
            if n[i+1]%2==1:s=s+n[i+1]
        print(s)  
        n=list(map(int,input().split()))
    except EOFError:
        break